SureFire Z2L-BK Z2 CombatLight LED 80 Lumens Virtually indestructible, electronically regulated light emitting diode has no filament to burn out or break; lasts for thousands of hours Precision reflector creates a smooth beam without dark spots or rings Rugged aerospace-grade aluminum body, Type II anodized in glossy black O-ring sealed; weatherproof Coated Pyrex window protects LED and reflector while maximizing light transmission