... . 4, ambient temperature: -50 degrees to +70 wind&solar street lamp1, solar panels made by ourselves2, microcomputer intelligent impulse control, light ... 7, special waterproof battery solar lamps. 8, lamps: computer design, die-casting aluminum, plastic. 9, the lighting time, 10-14 hours ... a day. 10, the system life: more than 20 years wind&solar street lamp