Scorn,
I have a Trijicon Reflex II that has served me well. This sight has a light-gathering device in the front that works quite well. This means that the brighter the environment, the brighter the triangle is. It is quite bright out of doors. The one problem is if you are shooting indoors at a target that is outdoors, your reticle might be "washed out" by the bright target. The triangle, by the way, is very useful. I can make accurate shots out to 350 yards using the top post of the triangle . . . with a 14.5 inch barrel, no less. Considering that I'm not even a good shot, this is quite remarkable!