... life, free of maintenance, environmental protection. 1. push the switch to the main light source position if necessary, ... Miner’s lamps could work continuously or intermittently, push switch to adjust the light source when in the ... light source is 0.15A, which can be illuminated for more than 14 hours; the rated working ... source is 0.07A, which can be illuminated for more than 20 hours when only use ...