tjones96761
Newly Enlightened
- Joined
- Jun 22, 2013
- Messages
- 17
hello all. new to the forum, hope you guys can enlighten me (pun intended). I'm still restricted for being a new member, please excuse the run-on as I can't use enter button for paragraphs for some reason. Recently got into bowfishing, and I mean REALLY got into it. I've been researching LEDs and have purchased a couple from a US vendor that is sourcing from China. The more I research what's available, the more I think the US vendors are making a killing and I want some of that action. Also, the bowfishing lights are in the stone age as far as what's available in my opinion. SO, questions about heat sinks - how hot is too hot? I see 50w chips rated for 60C which is pretty hot. in theory, if a 50w chip is stuck to a heat sink and putting out 4000 lumen @ 40C, how much is the lumen output affected if the temperature goes to 50C? and inversely down to 30C? I do purchasing for an oilfield equipment manufacturer, so I go to China 3-4 times a year. I'd like to get some ideas together and have components made in China and assemble in the US with US made chips. emphasis being specifically on lights for bowfishing, of course... I've done a fair amount of electrical work with VSDs, and one thing keeps coming back to me. VSD manufacturers run water over heat sinks to reduce size and operate where ambient temperature is high. I don't know why this concept hasn't made it into LED lighting, maybe it has and it just didn't work. I have some experiments set up to test heat, but don't have a meter to test light output. Because these lights will be used on lakes, I think I should be able to configure a heat sink that is water cooled. water will be pulled out of the lake at roughly 82F, ran through the heat sink and back into the lake. My thinking is by doing this I can run say 100w chips on a 3x3" heat sink. Let's skip the idea of underwater lights for now. No one seems to high on the idea of cutting holes in their boats for lighting. Up for any ideas, input and help. Thanks.