There is no more proven brand then Surefire, they are to high yield lights what Glock is to polymer frame pistols, they did is first they did it best. Though unlike Glock Surefire continues to evolve thier products exponentially. They have been used in combat since they became avialable. I just picked up 2 of thier 2011 6PXPro 200 lumen LED units and they are very impressive, have them mounted on 2 AR's. I carry a 2 year old 'Backup' model whenever I am out and carrying a handgun. (meaning anytime I go anywhere and carry a 1911) I also have several 6P's. To compare a Surefire to a maglite is the same as comparing a .308 to a pellet gun.
You can beat the hell out of them and they will keep running, my hunting light (6P) has been dropped 20 feet from a treestand, fell on the pavement out of my truck, fell in a creek when I was dragging a deer, and other spills I prob dont remember. Its still on the origional bulb and works perfectly. And the 6P is an entry level unit for Surefire.
Using a 200 lumen light outside at night is amazing, 6PXPro will light up a target at 100 yards with perfect clarity. On that topic, the quality and design of the reflector, lens and bezel are often over looked, there are other hi yield lights out there but many have a much less, clean, even and focused distribution, believe it or not you can see a major difference between some brands.
Anyway, bottom line is you get what you pay for usually and Suerfire is worth every penny, hope this helps your decision.
