... hours (highest in the second level output)-enough,Light Head Surface Temperature : 45 degree centigrade ( ... Spot Size: 7 cm @ 40mm(appropriate), Light Head Weight : 11g (including mount,not including ... wire,lightweight),Light Head Diameter: 1.9cm, Light Head Length : 2.1cm(very small ... charge(very quick), Dental led head light , head lamp, Surgical head lamp MP-146