qwertyydude
Flashlight Enthusiast
- Joined
- Aug 10, 2008
- Messages
- 1,115
Just a theoretical, if the power supply wasn't affected by temperature, is there a minimum operating temperature for led's? Say will it work while submerged in liquid nitrogen?
Just a theoretical, if the power supply wasn't affected by temperature, is there a minimum operating temperature for led's? Say will it work while submerged in liquid nitrogen?
Are you going to put the LED in liquid nitrogen with the battery not in it?Exactly my point. I know they work just fine in a really cold freezer. I left mine in there overnight with no battery. Put one in and it lit up fine. I wanted to know if there was a lower limit for just the led alone.
No unfortunately I don't have access to liquid nitrogen. But I'll tell you what I plan on doing. I have an xp-g led on a star with a tiny nick on the dome. Not even visible except with a 10x loupe but it bothers me so I won't use it. So I'm going to buy some dry ice and press the star on top and let it get really cold. I wonder if it's true that they get brighter as you go colder so if you go super cold you get super bright.
I don't know about liquid nitrogen, but this winter I'll try putting some lights in the creek after it gets really cold!Just a theoretical, if the power supply wasn't affected by temperature, is there a minimum operating temperature for led's? Say will it work while submerged in liquid nitrogen?
a semi conductor can become a superconductor at very cold temperatures.
so the LED would be ok, but maybe end up with an exponential need for amps
At low enough temperatures, would there be a chance that differential thermal contraction could damage parts of an LED, or its mounting arrangement?
No unfortunately I don't have access to liquid nitrogen. But I'll tell you what I plan on doing. I have an xp-g led on a star with a tiny nick on the dome. Not even visible except with a 10x loupe but it bothers me so I won't use it. So I'm going to buy some dry ice and press the star on top and let it get really cold. I wonder if it's true that they get brighter as you go colder so if you go super cold you get super bright.
And remember: DON'T TOUCH IT!!! Yes, you can touch dry ice if you're quick and careful but you WILL hurt yourself if you touch a liquid at the same temp. [and I know there are people saying duh to this but people like me are too curious for our own good sometimes 8o)