not to trash the trijicon reflex but you just hit on why i passed on it and went with the eotech 512 it's 9 brightness settings compensate for washout even in bright sunlight on white surfaces.........A problem with the sight is red dot wash out. If you are aiming into an area that is much brighter then where you are, your red dot will not be visible. That’s because the red dot is not adjustable for brightness, instead self adjusting via available ambient light. The fiber optics can only make the dot as bright as the available light source can provide for. The triennium lamp is dim, and only visible in low light conditions. I hope that makes sense. Situations where I have experienced wash out included; aiming from inside a dimly lit building to the bright outdoors and aiming into the headlights of an approaching vehicle at night.
Not worrying about batteries is the thing I like most about them. I love reflex sights, but I really have a problem with any optic that's battery dependant. I'll only put them on guns that have iron sights also, just in case.I put a Trijicon RMR 9 MOA dual illuminated sight on my 870 and it rocks (IMO). It is rock solid and the amber dot is perfectly bright in both daylight and total darkness. I also like not having to worry about batteries.