Rechargeable Light on Demand Desk Lamp features a detachable area light that goes anywhere. The desk lamp is a Light on Demand stick and emergency light in one. During power outages, "Find Me" light turns on instantly to help locate the lamp and light stick. Light stick automatically charges when used as a desk light and plugged into a wall. Used as a desk lamp, the adjustable arm allows you to position the light where you need it, and the light will come on when the power goes out. Delivers low lamp output of 14 lumens for night-light, and high output of 55 lumens for task or area light. Lamp features two white LEDs. Offers more than five times the energy efficiency of an incandescent bulb. External power supply is Energy Star approved. Uses included NiMH 850mAh 3.6V battery pack or three AAA batteries in prolonged outages. Weighs 3 lb. 15.6 oz. (1803 grams). Lamp output generates a 14 lumens on low for 20 hours or 55 lumens on high for three hours.