I have the p60l drop-in from surefire for my g2, but I'm wondering if there is a better led drop in available. I would like a regulated led drop in that produces greater light, consistent light (regulated), even if it means a shorter runtime. Any suggestions? I have been reading about Cree Q5 but I cant find information on runtime and I'm not sure how it compares to surefires drop-in. Any help is appreciated.