Kensington 62641 FlyLight USB Notebook Light (PC/Mac) Designed for the mobile computer user, the FlyLight has an infinitely adjustable flexible neck to add light to your work space White LED-tech bulb has an average life span of up to 100,000 hours Small and lightweight Conveniently connects to an available USB port on your Windows PC or Macintosh desktop or notebook ( PowerBook ) computer When used on your portable computer, the light uses less than 90-seconds of your battery's power when used for 1 hour