Arc LS 4.5 Volts

[dave]

I received a Arc LS LED about 3 days ago and I tried it with resistors and it was a powerful light I posted a topic saying that it was not that bright but I had a loss connection and let me tell you it is 2 times as bright as my eternaLight if not more but I wanted even more light so I tried using it with no resistor and in about 5 sec it was to hot to touch but it was bright I work at a welding shop and I had a company that I do work for make a heat sink made for it using a maglite and after one hour of use it was 73°C I don't know how long the LED will last if anyone has a clue please tell me I think if the temp stays low it will be ok.

 

[Quickbeam]

The specs on the Luxeon site state that the LED junction temp should not exceed 120 deg.C. The aluminum core should not exceed 105 C. Rapid degredation will occur at or beyond this temp. It should be fine at 73 C. Heat is what kills LEDs, so keeping it cool is the trick. The spec sheets also have some basic graphs of the light output loss of the LED based on operating temp.

http://www.luxeon.com

Doug P.

 

[Go Go Gadget Flashlight]

Dave, was the body of the Maglite 73°C?

If so, I bet the temp at the LS itself is higher than that. May want to put a resistor in there. Or at least check the temp of the Luxeon.

 

[dave]

Gadget I was Measuring the LED the maglite was only warm to touch did not measure the maglite