High Temperature Environment LED Strip

Wurkkos

Colza

Newly Enlightened
Joined
Jul 8, 2012
Messages
2
I am working with a local company who use an LED light strip in a hot environment. The ambient temperature where the led's are is 85-90 deg C.
Currently they use a custom made strip with Cree XP-E (and now XP-E2) emitters, one every 75mm, running at 350ma. The emitters are soldered directly to a fiberglass PCB which is then fixed to an aluminium plate using conductive adhesive tape.

This solution works, they have had them in the field for a few years now and they dont have many failiures, however they are very expensive to make. I am trying to help them find a more cost effective solution for their lighting.

One thing I want to address is the cost of the Cree emitters, I think the best price we can get is about $2.00 each. For 1m of strip this is $26 just on the LED's! Once you add the cost of the PCB, the assembly, and a few suppliers markups on the way it gets very pricey. The cree's have been proven to work in the hot environment, but I am hoping I can find a cheaper emitter (possibly in conjunction with an aluminium PCB to improve thermal transfer to the heatsink) which will do the same job. I have seen it mentioned on this forum that Philips Lumileds have better heat transfer characteristics than Cree would this be a good choice for me in this application?

I have also been doing research into some 'alternative' technologies which I hope I will get the chance to explore (including heatpipes, fiber optics, and thermoelectric modules), but before I go down that track, I want to see what can be achieved with the existing arrangement. Does anyone have any thoughts or recommendations?
 

SemiMan

Banned
Joined
Jan 13, 2005
Messages
3,899
Xbd are cheaper and luxeon rebels take heat better. Cost is all relative though. Proper thermal prepreg is better for heat. Any more complex answer takes more info on your part.

Semiman

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