Led lenser h3led lenser h3 is a popular lightweight head torch with an integrated non dazzle dimmer switch that makes it especially helpful for localised hands free lighting around the home or workplace instead of a single super strength light it has three energy efficient leds delivering a bright and comfortable 60 lumens of light up to 31 metres with a potential burn time of up to 62 hours when used on the lowest lumen setting on the back of the comfortable elasticated headband there is a batt