Hi guys, first post here but I have been looking around a while and this forum has proved to be pretty helpful. I have a question about LEDs. I just did a lab in school where I cooled LEDs by placing them close to liquid nitrogen and also heated them close to hot water and measured their voltage and observed light intensity or brightness. I came to the conclusion that when cooled down, the LEDs have a higher voltage running through them and they appear brighter. The opposite was true for when they were heated up. Now, I've been told that unlike a normal light bulb, Ohms law doesn't hold true for LEDs. And I assume this is because they are semiconductors and behave in a different way. I am struggling however to think of a way to explain the behavior of voltage and intensity in a way that relates to band gap theory. Hopefully someone can explain this relationship to me. Thank you!