The SL20X- LED 10 watt halogen bulb with a 100-hour lifetime Up to 38,000 peak beam candlepower (200 lumens)from halogen bulb 3 white LEDs with 100,000-hour lifetime provide up to 30 lumens Dual switches to select halogen or LEDs Constant-on and momentary modes Machined aircraft aluminum with anodized finish Up to 80 minutes runtime with halogen only; 40 hrs. for LEDs only; emergency backup LED (after full halogen run) = 1 hr. minimum High-capacity sub-C, nickel-cadmium rechargeable battery Power Failure Feature- when light is in charger in the “on” position, it will come automatically during power failure O-Ring sealed, water resistant 13.2” 1.7 lbs.