The M600DF Ultra Scout Light is a lightweight, compact weaponlight featuring an ultra-high-output LED that delivers 1200 lumens of blinding white light with 123A batteries and 1500 lumens of light with the SF18650A rechargeable lithium-ion battery. A proprietary Total Internal Reflection (TIR) lens shapes the recoil-proof LED's light into a beam with plenty of reach but enough surround light to accommodate peripheral vision, making the M600DF ideal for medium to longer range applications. The rugged M600DF attaches quickly and securely to any MIL-STD-1913 rail via its integral thumbscrew clamp. A slight press of the Z68 tailcap switch will activate the momentary-on, while fully depressing the tailcap until it clicks will activate constant-on.