[PSUBS-MAILIST] LED lights

[Alan via Personal_Submersibles]

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




> On 17/06/2019, at 9:15 AM, hank pronk via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> Jon,
> I have noticed looking at pictures from other subs that the spot light, lighting is spotty.  There are dark areas in the images.  This is an image taken a week ago at close to 300 feet in the darkest water I have ever been in.  Notice how even the lighting is and the light goes beyond the camera view.  You can make this light for a couple hundred bucks maybe 300 with hand tools.  I have had this light for a long time with lots of dives even to 435 feet with zero issues.  I tested one that I made for a friend to over 1,000 psi and another for Scott to over 3000 psi.
> Hank
> 
> On Sunday, June 16, 2019, 11:57:45 AM MDT, Jon Wallace via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> 
> Off the shelf LED lights.  Finding this frustrating, lots of crap available and by looking at hundreds of youtube reviews I've learned not to depend upon "lumen" claims.  Looks like you can't even trust many of the wattage consumed claims.
> 
> I bought a harbor freight ROADSHOCK (see link) to poke at just because they were inexpensive.  Turns out they are very well made and look like they would be easy to oil compensate.  I like them.  However, they are not very bright at all, only burning 15 watts.  I'm tempted to get one of the light bar models that burns 47 watts but at $65 there are much cheaper alternatives on Ebay.  Only problem is, how easy will those others be to pressure compensate and keep a seal?
> 
> Alec Smyth, if you are reading, what was your experience with those 4 inch LED work lights you pressure compensated a few years ago?  Those are still sold and are very inexpensive, and burn as much wattage as some of the more expensive light bars.  Did they hold up?
> 
> 
> 3 in. LED Flood Light
> 
> 3 in. LED Flood Light
> 965 Lumens 3 in. Flood Light
> 
> 
> 
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