Hazardous for duty use! professionals do not buy! - Crimson Trace Tactical Light for Rail-Equipped Long Guns, 500 Lumens

I gave this light 1 star because it is a flashlight and the light mount is okay and slim. I purchased two of these 500 Lumen lights for Duty use. First problem is the pressure switch is pointless! Every time you tap the momentary switch or constant on/off switch it Cycles to the next setting causing temporary Vision change in low-light settings, you must cycle through to the setting "before" the one you want then turn the constant on switch to use the light. Second problem is when using the momentary switch there is a high audible screeching sound coming from the light and the light flickers on both the high and low setting. Very disappointed with these lights and definitely not safe for weapon-mounted use. I would return the lights but by the time I got back I'm past the 30 days return policy.