So I dusted off the old headlamp now that the days are getting shorter. I was testing some batteries I had laying around and noticed just how stinking hot my headlamp gets.
I basically have 2 XM-L's slapped with thermal tape to a heatsink that I velcro to my bike helmet. They are being driven at 3000ma with a TaskLed B3Flex. 16AA Eneloops wired in series power the whole shebang (sitting in my camelbak).
The setup gets too hot to hold for more than 5-10 seconds. This hasn't bothered me in the past because it is usually <50degrees F ambient and I am on my bike constantly moving...so it doesn't get that hot. But inside at 75degrees sitting on my workbench it reached 150 degrees F with my IR thermometer.
The XM-L spec sheet says T-Max = 150degrees C....but something that is too hot to touch worries me.
Should I care? I almost never need to run both LEDs at full blown 3000ma, but if I want to does this temp seem too high to run safely?
Thanks!
I basically have 2 XM-L's slapped with thermal tape to a heatsink that I velcro to my bike helmet. They are being driven at 3000ma with a TaskLed B3Flex. 16AA Eneloops wired in series power the whole shebang (sitting in my camelbak).
The setup gets too hot to hold for more than 5-10 seconds. This hasn't bothered me in the past because it is usually <50degrees F ambient and I am on my bike constantly moving...so it doesn't get that hot. But inside at 75degrees sitting on my workbench it reached 150 degrees F with my IR thermometer.
The XM-L spec sheet says T-Max = 150degrees C....but something that is too hot to touch worries me.
Should I care? I almost never need to run both LEDs at full blown 3000ma, but if I want to does this temp seem too high to run safely?
Thanks!