Energizer LED Pen Light, Bulb, 1 W, AAA, AluminumBody, Silver (EVEPLED23AEHCT) Case of 4Pen light features one watt lifetime LED bulb that never needs changing. Bulb is 12 times brighter than standard bulbs. Push button tail switch offers one handed operation. Secure clip holds fast to pocket, briefcase or tool bag. Aluminum body minimizes damage from dropping and abuse. Pen light offers 6 lumens and a 100 hour runtime and runs on two AAA batteries. General Information Manufacturer: Energizer Holdings, Inc Manufacturer Part Number: