The advanced lighting technology incorporated in laptop computers is the amazing 10,000 hour life fluorescent lamp of our Lifetime Booklight. Most book lights only have a 40 to 50 hour life.The Lifetime Booklight provides an even,cool wash of clean white light over your book, and the steadydual arm design eliminates the "bouncing light" of some booklights.Runs on 4 AA batteries.Or use the optional AC/DC adapter or USB cable from your PC, and youll never need batteries. Now you can read in bed, on a plane, camping in the wilderness or anywhere your adventures take you without disturbing anyone around you. Sleek, compact, and extremely efficient, the book light is far more than your average bedside lamp. Attach it to your latest cant-put-it-down fictional romp with the included steel clip and enjoy the lights cool, focused beam as it spreads across both pages. The light is glare-free, so you dont have to squint while reading, and each bulb offers enough juice for 10,000 hours of reading (enough time to make it through the average congressional report). Befitting a portable book light, the Light Voyager folds up flat for easy storage and weighs a scant 3.8 ounces. This model comes in a hip silver color, and its not only cool-looking, but cool-feeling, staying chill to the touch even after hours of use.