[PSUBS-MAILIST] LED lights

[Alan via Personal_Submersibles]

Jon,
Will do a video tonight.
It was such a pain machining the housing on a small lathe with not a great
deal of experience, that I am not wanting to make up a lot of them myself.
I have done the hard work in prototyping them though.
Another thing I forgot to mention is that any off the shelf unit that you may
oil compensate will probably have big electrolitic capacitors in them.
You may know that these have slits in the top of them that create a weak point
so if they blow they blow out the top. I am not sure that they put these slits in 
in the old days, but this makes them particularly weak under pressure.
BTW I tested my lights out to 1000psi.
Cheers Alan



> On 17/06/2019, at 10:41 AM, Jon Wallace via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> Alan,
> 
> Sounds like we have similar experiences.  While it's great that you can get anything you want on the internet and delivered right to your door, trying to get the right thing by looking solely at pictures really can make it hit or miss.
> 
> I love the Bridgelux design that Cliff came up with, just not practical for me since I don't have the tooling machines to fabricate them.  For my purposes, I'd want 5-6 lights and so having them custom made turns out to be some serious money.
> 
> I'm interested in any photos/film you have.  Either post on FB or resize to fit on the mailing list.  If you want to send to me privately I'll resize them and post them on the list here.
> 
> Jon
> 
> 
> On Sunday, June 16, 2019, 06:26:03 PM EDT, Alan via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> 
> 
> Hi Jon,
> I sent this email out with 3 photos attached but must have been too big,
> so repeating it without photos.
> I spent an inordinate amount of time on this; initially Googling & ordering in 
> lights I thought I could modify.
> One problem for me is that they have to go in sea water, so need to be marine 
> or hard anodised. I was prepared to strip & hard anodise an existing product.
> In the end I built my own. 
> I wanted a low profile light that could fit in to a recess & be dimmed.
> With the design I have, I can replace the front plate with a wider plate that has
> a second set of holes, for mounting in to a ferring.  
> I put the led driver in the hull rather than the light for a number of reasons.
> 1/ The led puts a huge amount of heat out the back & that would put the
> electronics under stress. I have had to heat sink a component on my electronics
> without any additional heat coming from the light.
> 2/ I would have had to machine another compartment on the light & fit them.
> 3/ Easy to get at the electronics & test them.
> 4/ Less wires through the hull as I have dimming on my units.
> 5/ Won't be destroyed by water ingress in to the light. ( the led only costs $6-)
> The cave video I put up on Facebook doesn't make them look impressive as
> the black walls & black sand suck up the light. I think it's about 1:40 in where it
> Illuminates my friend that you get an idea. Maybe I could put a video profiling 
> them up on Facebook if wanted!
> At the moment I need to order in some more components for additional lights.
> If there was interest I could find a local machine shop to make up a number of
> housings. I am guessing the housings would be more than NZ $100- each just
> for the machining. Parts & material for the rest of the light, maybe $100 +
> freight.
> Alternatives are Emile's lights & I think Cliff had his light housing made up
> in a machine shop, so perhaps with Cliff's cooperation they could make up
> some more!
> Alan
> 
> 
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