Ironton LED Flashlight - 10 Watt, 600 Lumens, IPX-4 Rating Bulb has an extra long 100,000 hr. lifespan TC Technology (constant current circuitry technology) offers consistent brightness throughout the life of the battery - no dimming as the battery runs low Anti-reverse connection capability prevents damage from improper battery installation Premium Type III anodized coating resists scratching for a durable finish Ultra-clear glass lens with anti-reflective coating maximizes light output