Pen 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.Pen 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.