LED While You Write! The Flex-Brite LED Pen not only writes with precision, but it illuminates dimly lit areas using a built-in LED on the clip. The flexible, yet sturdy rubberized clip stays at the desired angle for bright, focused light where needed. It"s great when doing some paperwork on dimly lit airplanes, signing a check in a dark restaurant, even for finding items in a purse or backpack.