Here’s some light reading: The Energizer Book Light emits a warm, white LED light with superior contrast for optimal reading conditions or other up-close tasks. The exclusive beam design delivers broad illumination while still being narrow enough to not bother anyone near you. Forget lugging around a flashlight, this book light is easy to travel with—its flexible neck and compact size fit in your pocket, backpack, or purse without hassle. Simply clip the reading light onto a book, binder, tablet, eReader, car visor, or any other surface that is 0.5 inches (13mm) thick. Order the Energizer LED Book Light now and stop reading this, so you can start reading everywhere.The Energizer LED Book light is lightweight at only 1.3 ounces with batteries, yet, it broadcasts 14 lumens of light for 10 hours or more. The rubber neck bends easily and holds its position for precision lighting. Energizer's LED book light has recently undergone several improvements, including a rubber flex neck that has been modified to hold its position better than before. A wide angle Nichia LED is now being used that provides a wider and more evenly broadcast flood of light than previous models. The oversized spring clip easily attaches to books, Kindles, clipboards, car visors etc. and the replaceable Lithium coin cells provide a long-lasting 10 hours of continuous reading.