[PSUBS-MAILIST] LED lights

[Rick Patton via Personal_Submersibles]

I am still trying to come up with a viable working LED light system and I
think I have it boiled down to cheap arrays? I have a friend helping me
that understands electricity a lot better than I do and he seems to think
it's a heat issue, not dispersing it quick enough.

I am using a 10,000 lumen array that is about 1 1/2" square and costs $2.75
each and made in china. Well, you've herd the saying, you get what you pay
for? These are rated for about 100 watts and like to see around 34 volts so
were running them threw a buck booster? and dialing them down to that from
about 38 volts and then running them threw a PWM and then to the array.

 I at first was putting them in a housing that I had fabricated for them
using a strain relief fitting to run the power cord threw as the housing is
full of mineral oil then setting the housing in a 5 gal bucket of cool
water and they are still burning out so I tried just hanging an array by
it's wires into a container of mineral oil and still only lasting a couple
of minutes so I got a thin cold pack from the freezer (without telling my
wife of course!) and sandwiched the array in it thinking that that would
eliminate any questions of the heat dissipation theory and it still only
lasted a minute!

My friend is still insistent that its a heat problem and that the thin
layer of plastic that holds the frozen stuff in is enough to keep the array
from seeking the relief that it needs before melting down which I don't
agree with. He says he can hang an array by it's wires in a bucket of tap
water for a number of hours with no issues and that water disperses heat
much faster than oil.

Sorry for the long post but I felt it necessary to let you guys know
exactly what I am doing for better input. I want to put this behind me so I
can get on to the next thing! It would be helpful to hear from those who
are using a small high luman LED array as to what you are using and where
did you buy it. PS: I snuck the cold pack back into the freezer unnoticed!😂
Rick
The fissures stopped spewing lava two days ago so will hope for the best
but looters are having a field day!
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