LOOK_HERE!!! <----This is what I have in my G2 and 6P and I absolutely love them. For the price, you really can't go wrong; it's a steal.
I got one of those, but it's not terribly bright on a 17650. In the reviews it's stated that it's not much brighter on 2XRCR123, but can anyone confirm that's true? Since the voltage input is so wide, shouldnt the light be a lot brighter with more voltage? Or is there a circuit that regulates the light output regardless of the input?