Drak OPS Hellfighter X-12 Flashlight - Interrogator Bezel Light 6-1/2" overall. Xenon Halogen bulb generates up to 150 peak lumens. Aircraft grade 6061-T6 511 aluminum body with the most comprehensive finishing and anti-corrosion treatments on the market today. Fits standard 30 mm scope rings and features a patent pending lockout bezel assembly, which completely disables the light as needed. Shock-isolated bulb can endure the pounding of large caliber automatic weapons fire. Momentary/lock-on switch allows for intermittent tactical use as well as single thumb lock-on activation. Operates at full power from -10 degrees to +130 degrees Fahrenheit. With 6 Viton high-temp double O-rings at the connection surfaces, it is waterproof. Uses two DL123 series 3-volt lithium batteries (included).