SureFire MaximusSlap Darkness In The Face. Extreme conditions call for extreme measures. The rechargeable SureFire Maximus handles them by delivering an amazing 1,000 lumens of MaxVision Beam shaped light that can be dialed down, lumen by lumen, to give you just the amount you need. Keep it on lower settings for closer work, preserving your dark adapted vision and extending the runtime. Turn up the power to light any environment. Its large, knurled dial permits