Streamlight SL-20X LED Flashlight 10 watt halogen lamp with a 100 hour lifetime Up to 38,000 peak beam candlepower; 200 lumens from halogen bulb Dual switches to select halogen or LEDs 13.2" 1.7 lbs Available in Black The Streamlight SL-20X LED Flashlight is a full-size professional grade rechargeable flashlight that has 40 hr. runtime LEDs for backup illumination.  Up to 80 minutes runtime with halogen only. The SL-20X LED also has a power failure feature- when the light is in the charger- in "on" position, it will come on automatically during power failure.