This is not difficult because the voltage of common LED emitters is about the same voltage as Lithium batteries (3.7v, 7.4v, etc) which makes the current limiting relatively simple coming from a one or two cell light. They do many different jobs in all kinds of devices. In a flashlight the power comes from a DC battery through a current regulator (LED driver) and into the LED itself. Light emitting diodes, commonly called LEDs, are real unsung heroes in the electronics world. The part that I am most curious about is how the electricity from the socket gets to the emitter. 2006 Silverado, I switched out my lights for LED lights a now left turn indicator light stays on, lights hyper flash and - Answered by a verified Chevy Mechanic. It is very similar to a flashlight - it has a large heatsink, and 1 or more LEDs inside of it (brand and specs of emitters, I do not know). I have been using and making LED flashlights for years now and I am VERY familiar with all of the circuitry and technology inside of them, but I just got my first LED house light bulb that runs off of 110v AC electricity.
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