OttLite Rechargeable/Expandable Battery Lamp Black 13W Model 571PN3 Rechargeable battery provides up to 3 hours of battery use Adjustable head lifts up and down Portable fold-up design with automatic on/off Includes energy efficient 13-Watt OttLite tube-rated to last up to 10,000 hours,Bulb Type F Complete detail and color accuracy