my fenix L2D is heating up, is it normal?

gazaati

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On general mode highest setting, it becomes very worm. Is this normal?

I expected this on turbo mode but not on general.
 
Yes it's normal. While LED's don't generate heat as a function of emitted light (IR) they are only about 30% efficient(incans are roughly 10-15%). So 30 percent of the power going in gets turned to light, the other 70% as waste heat. While your fenix uses one of the latest high efficiency LEDs on high mode the waste heat becomes noticable, but is fine for extended use. Turbo shouldn't be used for more than a minute or two at a time otherwise it may lead to premature failure of the LED (heat kills them).
 
On high setting, the L2D Q5 will get warm/hot. It is ok to run for extended periods if you are holding the light as your hand will transfer some of the heat away from the light. I would not recommend leaving the light on in high or turbo mode if you are not holding it.

If using turbo mode, Fenix recommend no more than 10 minutes in high ambient temperatures.

On lights like the TK10, there are no such restrictions as the larger head allows for better heatsinking of the LED.
 
if my P2D-CE comes on in my pocket (it has one time) i sure notice it lol..........
 
Yes LEDs do create heat especially the more powerfull ones. It's interesting that my Pelican is all plastic and the very similar Surefire G2LED has an aluminum head to dissipate the heat. All transistors have one big enemy - heat !
 
The first run of G2 LEDs have nitrolon heads. Thankfully the P60L module they use is thermally protected. The all nitrolon lights run longer than the aluminum ones because the module draws less current to prevent itself from overheating.
 
What do you expect from something the size of a small cigar that gives off the light of a 6 cell D Maglight. They are amazing, I love mine!
 
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