The 4AA LED is Class I, Division 1 - Approved. It features seven super-bright, 100,000-hour LEDs - so you'll never need to replace a bulb again. It's also remarkably comfortable to use because it's ergonomically shaped for your hand. Helmet clamps are available for convenient, hands-free operation. Run time of up to 155 hours of continuous use. Features: Battery: 4 AA Lamp: Seven 100,000-hour lifetime, high-intensity LEDs Material: Shock resistant, engineering grade polymer case; Unbreakable polycarbonate lens. Color: Yellow Weight (with batteries): 6.3 ounces Dimensions: 1.69" (D) x 6.5" (L) Run Time: Up to 155 hours Special Features: Class I, Division 1-Approved for use in hazardous locations; Waterproof; Non-conductive and corrosion-proof. Streamlight