[PSUBS-MAILIST] LED lights

Sat May 12 18:29:04 EDT 2018

 Rick,Buy yourself some off road truck LED lights and put them in your housings if you like and fill with vegetable oil (for the environment  )  make sure the housing has a way for the oil to expand.  I have two LED car headlights with the fans removed submerged half way in oil inside the fixtures and have run them for an hr strait last weekend.Hank
    On Saturday, May 12, 2018, 2:52:10 PM MDT, Rick Patton via Personal_Submersibles <personal_submersibles at psubs.org> wrote:  

 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!😂RickThe fissures stopped spewing lava two days ago so will hope for the best but looters are having a field day!_______________________________________________
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