Great little flashlight - Streamlight PolyTac C4 LED Lithium Polymer Tactical Flashlight

This small, light flashlight produces an amazing amount of light. It's not cheap, and neither are the batteries, but if you want a small, very bright flashlight, this is the way to go.

I bought this to use for "light painting" in night photography, but it's so useful I think I'll buy more (for the office, car, etc.).
Pros: small, light, very bright
Cons: expensive, requires special lithium batteries

This review was written in the old system and had content requirements that are different than reviews written today.