Brite-Strike makes a lot of cool stuff, but bang for the buck, it's hard to beat this company's Basic Tactical Lights. They were designed by a cop for cops, and they make great second lights for patrol officers. The Basic Tactical Light is available in two models, one with strobe and one without. Both models produce a blinding 150 lumens at max power. Battery life is about eight hours on low (80 lumens). List price is $70 without strobe, $90 with strobe. You can find them for much less.