I saw mentions of lights on weapons. Yes, agreed, good idea. I have lost count of exactly how many Surefire X200/X300-series Weaponlights we have. The X200B is my favorite for rooms with white ceilings and light-colored walls, and almost never leaves one of my G19 pistols. The X300U, with its 600 lumens, is a bit too much for small rooms with white ceilings and light-colored walls, but nice to have outdoors. (I work night-shift police patrol, in a big city; none of this is armchair speculation.) The original-version X300 is a happy medium. The several original X200 lights thay we have are nice to have in reserve