<html><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px"><div id="yui_3_16_0_1_1437872182587_4678"><span id="yui_3_16_0_1_1437872182587_4677">Thanks for that info Hugh.</span></div><div id="yui_3_16_0_1_1437872182587_4680"><span id="yui_3_16_0_1_1437872182587_4679">This extract from a manual below, is for a 700lm light. So heating as you say will be a big issue.</span></div><div id="yui_3_16_0_1_1437872182587_4680"><span id="yui_3_16_0_1_1437872182587_5346">How hard is thermal rollback Ken???.....</span></div><div id="yui_3_16_0_1_1437872182587_4680" dir="ltr"> General Notes and Warnings
The Nano SeaLite can be run in air, but will go into thermal
rollback, where its light output diminishes to protect the
light from overheating. This is normal and purposely
designed to protect the LEDs from being damaged by
excess heat buildup while running in air. The light will
return to full brightness once it is submerged in water
or it’s allowed to cool down. This thermal rollback will
not happen when light is being operated in water under
normal usage.
WARNING
When the Nano SeaLite is operated in air the body
may reach temperatures in excess of 65° C. These
temperatures may be enough to cause burns if the light is
handled without protective clothing.<span><br></span></div><div id="yui_3_16_0_1_1437872182587_4680" dir="ltr">Alan</div><br> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id="yui_3_16_0_1_1437872182587_4833"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id="yui_3_16_0_1_1437872182587_4832"> <div dir="ltr" id="yui_3_16_0_1_1437872182587_4831"> <hr size="1" id="yui_3_16_0_1_1437872182587_4830"> <font size="2" face="Arial" id="yui_3_16_0_1_1437872182587_5421"> <b><span style="font-weight:bold;">From:</span></b> Hugh Fulton via Personal_Submersibles <personal_submersibles@psubs.org><br> <b><span style="font-weight: bold;">To:</span></b> 'Personal Submersibles General Discussion' <personal_submersibles@psubs.org> <br> <b><span style="font-weight: bold;">Sent:</span></b> Sunday, July 26, 2015 12:34 PM<br> <b><span style="font-weight: bold;">Subject:</span></b> Re: [PSUBS-MAILIST] LED Lights<br> </font> </div> <div class="y_msg_container" id="yui_3_16_0_1_1437872182587_5427"><br><div id="yiv0983907785"><style>#yiv0983907785 #yiv0983907785 --
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#yiv0983907785 </style><div id="yui_3_16_0_1_1437872182587_5426"><div class="yiv0983907785WordSection1" id="yui_3_16_0_1_1437872182587_5425"><div class="yiv0983907785MsoNormal"><span style="font-size:11.0pt;">40 degrees gives you 30 degrees</span></div><div class="yiv0983907785MsoNormal" id="yui_3_16_0_1_1437872182587_5424"><span style="font-size:11.0pt;" id="yui_3_16_0_1_1437872182587_5423">120 degrees gives you 80 degrees</span></div><div class="yiv0983907785MsoNormal" id="yui_3_16_0_1_1437872182587_5429"><span style="font-size:11.0pt;" id="yui_3_16_0_1_1437872182587_5428">It doesn’t matter whether acrylic, Glass or borosilicate with flat planes.</span></div><div class="yiv0983907785MsoNormal"><span style="font-size:11.0pt;"> </span></div><div id="yui_3_16_0_1_1437872182587_5432"><div class="yiv0983907785MsoNormal" id="yui_3_16_0_1_1437872182587_5431"><span style="font-size:11.0pt;" id="yui_3_16_0_1_1437872182587_5430">The only reservation on my lights is that I have not done a lens for the seawater to optimise angles etc. Also my reflector is round with a square LED.</span></div><div class="yiv0983907785MsoNormal" id="yui_3_16_0_1_1437872182587_5433"><span style="font-size:11.0pt;" id="yui_3_16_0_1_1437872182587_5434">Looks great in the swimming pool at night but as I haven’t dived it I have no experience as to how it will look in the sea.</span></div><div class="yiv0983907785MsoNormal" id="yui_3_16_0_1_1437872182587_5436"><span style="font-size:11.0pt;" id="yui_3_16_0_1_1437872182587_5435"> With a really compact light and 94 watts of heat it is not going to last long in the air. It will need serious fins. Needs to be idiot proof.</span></div><div class="yiv0983907785MsoNormal" id="yui_3_16_0_1_1437872182587_5438"><span style="font-size:11.0pt;" id="yui_3_16_0_1_1437872182587_5437">One thing is that it needs to have automatic dimming reduction for temperature so it does not desolder or destroy O’rings etc.</span></div><div class="yiv0983907785MsoNormal" id="yui_3_16_0_1_1437872182587_5440"><span style="font-size:11.0pt;" id="yui_3_16_0_1_1437872182587_5439">I will try and work out how the forum works and go to that. I could not get into it but could view it. </span><span lang="EN-NZ" style="font-size:11.0pt;"></span></div><div class="yiv0983907785MsoNormal" id="yui_3_16_0_1_1437872182587_5441"><span lang="EN-NZ" style="font-size:11.0pt;">Hugh</span></div></div><div class="yiv0983907785MsoNormal" id="yui_3_16_0_1_1437872182587_5442"><span style="font-size:11.0pt;"> </span></div><div class="qtdSeparateBR"><br><br></div><div class="yiv0983907785yqt8860726628" id="yiv0983907785yqt66921"><div id="yui_3_16_0_1_1437872182587_5445"><div style="border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm;" id="yui_3_16_0_1_1437872182587_5444"><div class="yiv0983907785MsoNormal" id="yui_3_16_0_1_1437872182587_5443"><b><span style="font-size:10.0pt;">From:</span></b><span style="font-size:10.0pt;" id="yui_3_16_0_1_1437872182587_5446"> Personal_Submersibles [mailto:personal_submersibles-bounces@psubs.org] <b>On Behalf Of </b>Ken Martindale via Personal_Submersibles<br clear="none"><b>Sent:</b> Sunday, 26 July 2015 11:58 a.m.<br clear="none"><b>To:</b> 'Personal Submersibles General Discussion'<br clear="none"><b>Subject:</b> Re: [PSUBS-MAILIST] LED Lights</span></div></div></div><div class="yiv0983907785MsoNormal" id="yui_3_16_0_1_1437872182587_5447"> </div><div class="yiv0983907785MsoNormal" id="yui_3_16_0_1_1437872182587_5449"><span style="font-size:11.0pt;" id="yui_3_16_0_1_1437872182587_5448">PS We are supposed to be discussing the LED light on the forum?</span></div><div class="yiv0983907785MsoNormal" id="yui_3_16_0_1_1437872182587_5450"><span style="font-size:11.0pt;"> </span></div><div class="yiv0983907785MsoNormal" id="yui_3_16_0_1_1437872182587_5451"><span style="font-size:11.0pt;">ken</span></div><div class="yiv0983907785MsoNormal" id="yui_3_16_0_1_1437872182587_5452"><span style="font-size:11.0pt;"> </span></div><div id="yui_3_16_0_1_1437872182587_5454"><div style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm;" id="yui_3_16_0_1_1437872182587_5453"><div class="yiv0983907785MsoNormal" id="yui_3_16_0_1_1437872182587_5457"><b id="yui_3_16_0_1_1437872182587_5456"><span style="font-size:11.0pt;" id="yui_3_16_0_1_1437872182587_5455">From:</span></b><span style="font-size:11.0pt;" id="yui_3_16_0_1_1437872182587_5459"> Personal_Submersibles [<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles-bounces@psubs.org" target="_blank" href="mailto:personal_submersibles-bounces@psubs.org">mailto:personal_submersibles-bounces@psubs.org</a>] <b>On Behalf Of </b>Hugh Fulton via Personal_Submersibles<br clear="none"><b id="yui_3_16_0_1_1437872182587_5458">Sent:</b> Saturday, July 25, 2015 7:33 PM<br clear="none"><b>To:</b> 'Personal Submersibles General Discussion' <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br clear="none"><b>Subject:</b> Re: [PSUBS-MAILIST] LED Lights</span></div></div></div><div class="yiv0983907785MsoNormal"> </div><div class="yiv0983907785MsoNormal"><span style="font-size:11.0pt;">Re- Dimming.</span></div><div class="yiv0983907785MsoNormal"><span style="font-size:11.0pt;">Would it not be better to have 2 switchable intensities rather than variable. Then you can have a 3 position switch. Is it simpler?</span></div><div class="yiv0983907785MsoNormal"><span style="font-size:11.0pt;">Hugh</span></div><div class="yiv0983907785MsoNormal"><span style="font-size:11.0pt;"> </span></div><div class="yiv0983907785MsoNormal"><span style="font-size:11.0pt;"> </span></div><div style="border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm;"><div class="yiv0983907785MsoNormal"><b><span style="font-size:10.0pt;">From:</span></b><span style="font-size:10.0pt;"> Personal_Submersibles [<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles-bounces@psubs.org" target="_blank" href="mailto:personal_submersibles-bounces@psubs.org">mailto:personal_submersibles-bounces@psubs.org</a>] <b>On Behalf Of </b>Cliff Redus via Personal_Submersibles<br clear="none"><b>Sent:</b> Sunday, 26 July 2015 8:20 a.m.<br clear="none"><b>To:</b> Personal Submersibles General Discussion<br clear="none"><b>Subject:</b> Re: [PSUBS-MAILIST] LED Lights</span></div></div><div class="yiv0983907785MsoNormal"> </div><div><div><div class="yiv0983907785MsoNormal">Yes we did but we had two members that were pushing hard for dimming. From feedback, we were two for and two against. I would prefer not have it but if it makes the lite more generally accepted, I am willing to incorporate it. This last version of suggestions are just that, suggestions. A understand that nothing is frozen and we still do not have final consensus. </div></div><div><div class="yiv0983907785MsoNormal"> </div></div><div><div class="yiv0983907785MsoNormal">Cliff</div></div></div></div><div><div class="yiv0983907785yqt8860726628" id="yiv0983907785yqt75518"><div class="yiv0983907785MsoNormal"> </div><div><div class="yiv0983907785MsoNormal">On Sat, Jul 25, 2015 at 3:13 PM, Ken Martindale via Personal_Submersibles <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:</div><div><div><div class="yiv0983907785MsoNormal" style=""><span style="font-size:11.0pt;">Cliff,</span></div><div class="yiv0983907785MsoNormal" style=""><span style="font-size:11.0pt;"> </span></div><div class="yiv0983907785MsoNormal" style=""><span style="font-size:11.0pt;">Dimming, I thought we deleted this?</span></div><div class="yiv0983907785MsoNormal" style=""><span style="font-size:11.0pt;">Ken</span></div><div class="yiv0983907785MsoNormal" style=""><span style="font-size:11.0pt;"> </span></div><div class="yiv0983907785MsoNormal" style=""><b><span style="font-size:11.0pt;">From:</span></b><span style="font-size:11.0pt;"> Personal_Submersibles [mailto:<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles-bounces@psubs.org" target="_blank" href="mailto:personal_submersibles-bounces@psubs.org">personal_submersibles-bounces@psubs.org</a>] <b>On Behalf Of </b>Cliff Redus via Personal_Submersibles<br clear="none"><b>Sent:</b> Saturday, July 25, 2015 3:29 PM<br clear="none"><b>To:</b> Personal Submersibles General Discussion <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br clear="none"><b>Subject:</b> Re: [PSUBS-MAILIST] LED Lights</span></div><div class="yiv0983907785MsoNormal" style=""> </div><div><div><div class="yiv0983907785MsoNormal" style="">Ken, I took you latest pass on spec and generated a one page summary. </div></div><div><div class="yiv0983907785MsoNormal" style=""> </div></div><div><div class="yiv0983907785MsoNormal" style="">Cliff</div></div></div><div><div class="yiv0983907785MsoNormal" style=""> </div><div><div class="yiv0983907785MsoNormal" style="">On Sat, Jul 25, 2015 at 9:48 AM, Ken Martindale via Personal_Submersibles <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:</div><blockquote style="border:none;border-left:solid windowtext 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0cm;margin-bottom:5.0pt;border-color:currentColor currentColor currentColor rgb(204,204,204);"><div><div><div class="yiv0983907785MsoNormal" style=""><span style="font-size:11.0pt;">This light will require substantial cooling. Total dissipation is about 94 watts.</span></div><div class="yiv0983907785MsoNormal" style=""><span style="font-size:11.0pt;"> </span></div><div class="yiv0983907785MsoNormal" style=""><span style="font-size:11.0pt;">Puts out a lot of light. </span></div><div class="yiv0983907785MsoNormal" style=""><span style="font-size:11.0pt;"> </span></div><div class="yiv0983907785MsoNormal" style=""><span style="font-size:11.0pt;">Ken</span></div><div class="yiv0983907785MsoNormal" style=""><span style="font-size:11.0pt;"> </span></div><div class="yiv0983907785MsoNormal" style=""><b><span style="font-size:11.0pt;">From:</span></b><span style="font-size:11.0pt;"> Personal_Submersibles [mailto:<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles-bounces@psubs.org" target="_blank" href="mailto:personal_submersibles-bounces@psubs.org">personal_submersibles-bounces@psubs.org</a>] <b>On Behalf Of </b>Cliff Redus via Personal_Submersibles<br clear="none"><b>Sent:</b> Saturday, July 25, 2015 10:18 AM<br clear="none"><b>To:</b> Personal Submersibles General Discussion <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br clear="none"><b>Subject:</b> Re: [PSUBS-MAILIST] LED Lights</span></div><div class="yiv0983907785MsoNormal" style=""> </div><div><div><div class="yiv0983907785MsoNormal" style="">Alan, my thinking is that with the flange, you could mount the light either way. On the new boat I am designing, I am planning a FRP recess so that outside of the flange is flush with the outside of the FRP shell. Would still need to cut a hole were the body passes through the FRP shell. Yes this does reduce the convection heat transfer from the light but I was thinking of leaving say a 3/8 clearance around the recessed flange. I don't see any problem with either approach to sealing on a MPB by using a neoprene flat gadget.</div></div><div><div class="yiv0983907785MsoNormal" style=""> </div></div><div><div class="yiv0983907785MsoNormal" style="">Cliff</div></div></div><div><div class="yiv0983907785MsoNormal" style=""> </div><div><div class="yiv0983907785MsoNormal" style="">On Fri, Jul 24, 2015 at 3:58 PM, Alan James via Personal_Submersibles <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:</div><blockquote style="border:none;border-left:solid windowtext 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0cm;margin-bottom:5.0pt;border-color:currentColor currentColor currentColor rgb(204,204,204);"><div><div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style="">Cliff,</span></div></div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style="">I was thinking of fitting the light in to a bowl shaped</span></div></div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style="">recess in the fairing / ballast tank, whereas you were proposing</span></div></div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style="">cutting a hole out & fitting it in. In hindsight your idea is better</span></div></div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style="">because my idea would inhibit the heat dispersion due to the fiberglass</span></div></div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style="">surrounding the light fitting.</span></div></div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style="">Alan</span></div></div><div class="yiv0983907785MsoNormal" style="background:white;"><span style=""> </span></div><div><div><div><div align="center" class="yiv0983907785MsoNormal" style="text-align:center;background:white;"><span style=""></span><hr align="center" size="1" width="100%"></div><div class="yiv0983907785MsoNormal" style="background:white;"><b><span style="font-size:10.0pt;">From:</span></b><span style="font-size:10.0pt;"> Cliff Redus via Personal_Submersibles <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br clear="none"><b>To:</b> Personal Submersibles General Discussion <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> <br clear="none"><b>Sent:</b> Saturday, July 25, 2015 8:43 AM<br clear="none"><b>Subject:</b> Re: [PSUBS-MAILIST] LED Lights</span></div></div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style=""> </span></div><div><div><div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style="">Alan, I am visual kind of guy. Can send me sketch of what you are describing and we can talk.</span></div></div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style=""> </span></div></div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style="">Cliff</span></div></div></div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style=""> </span></div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style="">On Fri, Jul 24, 2015 at 3:23 PM, Alan James via Personal_Submersibles <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:</span></div><blockquote style="border:none;border-left:solid windowtext 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0cm;margin-bottom:5.0pt;border-color:currentColor currentColor currentColor rgb(204,204,204);"><div><div class="yiv0983907785MsoNormal" style="margin-bottom:12.0pt;background:white;"><span style=""> </span></div></div><div><div><div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style="">Looks a good solid light Cliff.</span></div></div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style="">On looking at the perpendicular cable entry, I was thinking we</span></div></div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style="">need a back entry for the purposes of mounting in to a housing</span></div></div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style="">in the fairing as you have requested in your list.</span></div></div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style="">I am looking at mounting in to ballast tanks so will create the shape </span></div></div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style="">of the light in the molding to receive it. If there was a threaded</span></div></div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style="">extension on the back of the light it could slot through a hole & be secured</span></div></div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style="">with a nut. This would make it easier to seal off the ballast tanks in</span></div></div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style="">my situation.</span></div></div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style="">Alan</span></div></div><div class="yiv0983907785MsoNormal" style="background:white;"><span style=""> </span></div><div><div><div><div align="center" class="yiv0983907785MsoNormal" style="text-align:center;background:white;"><span style=""></span><hr align="center" size="1" width="100%"></div><div class="yiv0983907785MsoNormal" style="background:white;"><b><span style="font-size:10.0pt;">From:</span></b><span style="font-size:10.0pt;"> Cliff Redus via Personal_Submersibles <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br clear="none"><b>To:</b> Personal Submersibles General Discussion <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> <br clear="none"><b>Sent:</b> Saturday, July 25, 2015 1:55 AM<br clear="none"><b>Subject:</b> Re: [PSUBS-MAILIST] LED Lights</span></div></div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style=""> </span></div><div><div><div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style="">Ken, if you go to Youtube and do a search on <a rel="nofollow" shape="rect" target="_blank" href="https://youtu.be/D7VnwODU7vk">https://youtu.be/D7VnwODU7vk</a>, or 5000 Lumen Bridgelux Vero 18 LED light, you will see a short video of the light.</span></div></div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style=""> </span></div></div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style="">Cliff</span></div></div></div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style=""> </span></div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style="">On Thu, Jul 23, 2015 at 3:29 PM, Ken Martindale via Personal_Submersibles <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:</span></div><blockquote style="border:none;border-left:solid windowtext 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0cm;margin-bottom:5.0pt;border-color:currentColor currentColor currentColor rgb(204,204,204);"><div><div class="yiv0983907785MsoNormal" style="margin-bottom:12.0pt;background:white;"><span style=""> </span></div></div><div><div><div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style="">Cliff,</span></div></div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style=""> </span></div></div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style="">How do I look at them??</span></div></div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style=""> </span></div></div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style="">Ken</span></div></div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style=""> </span></div></div><div><div class="yiv0983907785MsoNormal" style="background:white;"><b><span style="">From:</span></b><span style=""> Personal_Submersibles [mailto:<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles-bounces@psubs.org" target="_blank" href="mailto:personal_submersibles-bounces@psubs.org">personal_submersibles-bounces@psubs.org</a>] <b>On Behalf Of </b>Clifford Redus via Personal_Submersibles<br clear="none"><b>Sent:</b> Thursday, July 23, 2015 4:18 PM<br clear="none"><b>To:</b> Personal Submersibles General Discussion <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br clear="none"><b>Subject:</b> Re: [PSUBS-MAILIST] LED Lights</span></div></div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style=""> </span></div></div><div><div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style="">Now that Jon has the forum site set up for the LED light project, my suggestion is to move the discussion to the forum site called out in Jon's email. BTW, I have uploaded to the site the wiring diagram and housing drawings for the 5000 Lumen light that was designed by the ME students I was mentoring last year.</span></div></div></div><div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style=""> </span></div></div></div><div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style="">Cliff</span></div></div></div></div><div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style=""> </span></div></div><div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style="">On Thu, Jul 23, 2015 at 2:55 PM, Ken Martindale via Personal_Submersibles <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:</span></div></div><blockquote style="border:none;border-left:solid windowtext 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0cm;margin-bottom:5.0pt;border-color:currentColor currentColor currentColor rgb(204,204,204);"><div><div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style="">Doing the dimming electrically is easy but the problem is the extra wiring and where do you mount the Potentiometer?</span></div></div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style=""> </span></div></div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style="">We can include the wires in the cable for use as an option this also complicates the cabling. Instead of two wires we would require 4 wires.</span></div></div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style=""> </span></div></div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style="">Personally I also like the dimming since it will extend the time you can use it out of the water. Anybody also like or dislike? Cliff would like to delete.</span></div></div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style=""> </span></div></div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style="">You guys be sure to keep reading the spec. it will have almost daily updates for a while.</span></div></div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style=""> </span></div></div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style="">Ken</span></div></div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style=""> </span></div></div><div><div style="border:none;border-top:solid windowtext 1.0pt;padding:3.0pt 0cm 0cm 0cm;border-color:currentColor;"><div><div class="yiv0983907785MsoNormal" style="background:white;"><b><span style="">From:</span></b><span style=""> Personal_Submersibles [mailto:<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles-bounces@psubs.org" target="_blank" href="mailto:personal_submersibles-bounces@psubs.org">personal_submersibles-bounces@psubs.org</a>] <b>On Behalf Of </b>Alan James via Personal_Submersibles<br clear="none"><b>Sent:</b> Thursday, July 23, 2015 3:31 PM<br clear="none"><b>To:</b> Personal Submersibles General Discussion <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br clear="none"><b>Subject:</b> Re: [PSUBS-MAILIST] LED Lights</span></div></div></div></div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style=""> </span></div></div><div><div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style="">Cliff, Ken,</span></div></div></div><div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style="">I like the dimming option. The 10,000 lumens may be too much light in</span></div></div></div><div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style="">some low visibility conditions where there is a lot of back scatter.</span></div></div></div><div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style="">The 5,000 lumen option may act like a fog light.</span></div></div></div><div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style="">Also I am thinking of having lights mounted to the side which may not</span></div></div></div><div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style="">need to be as intense.</span></div></div></div><div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style="">Depth rating.... looking at the drawings of various 10,000 meter light housings,</span></div></div></div><div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style="">it seems simple to achieve a reasonable depth without much more cost.</span></div></div></div><div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style="">Potting the board..... I would be careful about what was potted in case some of the</span></div></div></div><div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style="">components needed to get rid of a bit of heat.</span></div></div></div><div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style="">Mechanical housing..... with you on that one Cliff. Like the idea of the recessed light.</span></div></div></div><div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style="">Alan</span></div></div></div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style=""> </span></div></div><div><div><div><div align="center" class="yiv0983907785MsoNormal" style="text-align:center;background:white;"><span style=""></span><hr align="center" size="1" width="100%"></div><div><div class="yiv0983907785MsoNormal" style="background:white;"><b><span style="">From:</span></b><span style=""> Clifford Redus via Personal_Submersibles <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br clear="none"><b>To:</b> Personal Submersibles General Discussion <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> <br clear="none"><b>Sent:</b> Friday, July 24, 2015 4:06 AM<br clear="none"><b>Subject:</b> Re: [PSUBS-MAILIST] LED Lights</span></div></div></div><div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style=""> </span></div></div><div><div><div><div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style="">Ken, good first pass at the specs. Below are comments. BTW, I will post these here as I have not been able to get the activation code back yet on registering at the forum.</span></div></div></div><div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style=""> </span></div></div></div><div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style="">Item 2.1 DC Voltage. If it were me, I would stick with nominal battery bank voltages of 24 and 36 VDC. When I switch to MK 101 thrusters, I dropped my main battery bank voltage to 36VDC my instrumentation bus is 24VDC. Would need a single fuse holder to accept fuses to handle different nominal voltages.</span></div></div></div><div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style=""> </span></div></div></div><div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style="">Item 4.0 Depth Requirement. In the spirit of keeping cost down, I think 500 meters (1640 ft) would be more than enough. I know Scott is designing a deep diving boat but is any one else shooting for more than 500m?</span></div></div></div><div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style=""> </span></div></div></div><div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style="">6.0 Dimming. I would omit the ability to dim the light. Yes I know it is easy from an electrical point of view but it forces us to go with more pins on the subsea connector. I am thinking on installing multiple lighs so I could just control on/off for each light. I could go either way on this but in the spirit of KISS, I vote to omit dimming.</span></div></div></div><div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style=""> </span></div></div></div><div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style="">8.3 Ports I would change plastic to acrylic. I don't think we will end up here but if we do, we can use PVHO flat view port calcs to size the acrylic lens.</span></div></div></div><div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style=""> </span></div></div></div><div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style="">9.0 Printed Wiring Boards. I really like the way the Minn-Kota motor controller PWBs are potted. Rather than using the spray on hydrophobic coatings, to me we should pot the board (accept for access to fuse). Therefore suggest changing the word coated to potted.</span></div></div></div><div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style=""> </span></div></div></div><div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style="">11.0 Mechanical Housing. I suggest. The LED panel light and PCB shall be contained in a single 1-atm flange mounted cylindrical housing with a low profile that can be recessed in a FRP shell with attachment screws from the rear of the flange. The housing should contain a single 29 LED Array rated at 10,000 lumens with a rated power of 91-140 lumens/W (109-71W). Mounting holes will be provided for an optional SS yoke style support bracket. </span></div></div></div><div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style=""> </span></div></div></div><div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style="">Material: Hard anodized 6061-T6 or 7071-T6 TBD (I have a grey beard machinist friend that owns a machine shop. He loves 7071-T6 as it is a dream to machine and stronger than 6061-T6.</span></div></div></div></div><div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style=""> </span></div></div><div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style="">On Thu, Jul 23, 2015 at 9:52 AM, Ken Martindale via Personal_Submersibles <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:</span></div></div><blockquote style="border:none;border-left:solid windowtext 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0cm;margin-bottom:5.0pt;border-color:currentColor currentColor currentColor rgb(204,204,204);"><div><div style="margin-bottom:12.0pt;"><div class="yiv0983907785MsoNormal" style="background:white;"><span style=""> </span></div></div></div><div><div><div><div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style="">Cost is critical. The electronics should be a small part of the cost. The housing might be the most expensive.</span></div></div></div><div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style=""> </span></div></div></div><div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style="">Hope you guys are reading the specification.</span></div></div></div><div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style=""> </span></div></div></div><div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style="">Ken</span></div></div></div><div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style=""> </span></div></div></div><div><div><div class="yiv0983907785MsoNormal" style="background:white;"><b><span style="">From:</span></b><span style=""> Personal_Submersibles [mailto:<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles-bounces@psubs.org" target="_blank" href="mailto:personal_submersibles-bounces@psubs.org">personal_submersibles-bounces@psubs.org</a>] <b>On Behalf Of </b>Clifford Redus via Personal_Submersibles<br clear="none"><b>Sent:</b> Thursday, July 23, 2015 10:18 AM<br clear="none"><b>To:</b> Personal Submersibles General Discussion <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br clear="none"><b>Subject:</b> Re: [PSUBS-MAILIST] LED Lights</span></div></div></div><div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style=""> </span></div></div></div><div><div><div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style="">Jon, thanks for setting up the forum. I am assuming we can post files as well.</span></div></div></div></div><div><div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style=""> </span></div></div></div></div><div><div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style=""> I agree low cost is important but having a functioning light is as well. OTS LED utility lights like that one you noted are not an option unless they can be potted. To me the best way to keep the cost low, is to publish construction drawings of a 1-atm DIY housing that a psubber could machine or have machined by a friend, and publish a design of a PCB that could be easily fabricated using one of the PCB online sites like ExperessPCB <a rel="nofollow" shape="rect" target="_blank" href="http://www.expresspcb.com/">www.expresspcb.com</a> and DIY populate the board. As a group, we design and build a prototype that I can test in my shop. If it works as designed, then we post to the psubs site a report, that includes the design drawings, circuit diagram, parts list and test results. </span></div></div></div></div><div><div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style=""> </span></div></div></div></div><div><div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style="">Getting a consciences on the design spec is the first step. </span></div></div></div></div><div><div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style=""> </span></div></div></div></div><div><div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style="">Cliff</span></div></div></div></div></div><div><div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style=""> </span></div></div></div><div><div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style="">On Wed, Jul 22, 2015 at 10:11 PM, Jon Wallace via Personal_Submersibles <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:</span></div></div></div><blockquote style="border:none;border-left:solid windowtext 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0cm;margin-bottom:5.0pt;border-color:currentColor currentColor currentColor rgb(204,204,204);"><div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style=""><br clear="none">My three words of advice...cost, cost, cost.<br clear="none"><br clear="none">One measure of a success for this project will be how many people actually build/use it. If it costs more to manufacture than just purchasing something like <a rel="nofollow" shape="rect" target="_blank" href="http://www.surpluscenter.com/Electrical/Lights/DC-Mobile-Equipment-Lights/12-24-VDC-3120-LUMEN-16-LED-UTILITY-FLOOD-LIGHT-12-999-B.axd">http://www.surpluscenter.com/Electrical/Lights/DC-Mobile-Equipment-Lights/12-24-VDC-3120-LUMEN-16-LED-UTILITY-FLOOD-LIGHT-12-999-B.axd</a> off the shelf then it's real world application by psubbers may be limited.<br clear="none"><br clear="none">Over-spec'ing the design above requirements for typical recreational operations (ie 10,000 psi capability) is likely going to drive up the cost. Also, let's remember that "cheap", "low cost", and "good price" are relative terms for a diverse group like PSUBS so include realistic estimates of parts and manufacturing especially if tooling is required.<br clear="none"><br clear="none">Jon<br clear="none"><br clear="none">_______________________________________________<br clear="none">Personal_Submersibles mailing list<br clear="none"><a rel="nofollow" shape="rect" ymailto="mailto:Personal_Submersibles@psubs.org" target="_blank" href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br clear="none"><a rel="nofollow" shape="rect" target="_blank" href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a></span></div></div></div></blockquote></div><div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style=""> </span></div></div></div></div></div></div></div><div style="margin-bottom:12.0pt;"><div class="yiv0983907785MsoNormal" style="background:white;"><span style=""><br clear="none">_______________________________________________<br clear="none">Personal_Submersibles mailing list<br clear="none"><a rel="nofollow" shape="rect" ymailto="mailto:Personal_Submersibles@psubs.org" target="_blank" href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br clear="none"><a rel="nofollow" shape="rect" target="_blank" href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a></span></div></div></blockquote></div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style=""> </span></div></div></div></div></div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style=""> </span></div></div><div><div><div class="yiv0983907785MsoNormal" style="background:white;"><span style="">_______________________________________________<br 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