wind&solar street lamp 3, the poles were: 6-12 m high, ... galvanizing spray. 4, ambient temperature: -50 degrees to +70 wind&solar street lamp1, solar panels made by ourselves2, microcomputer intelligent impulse control, light ... aluminum, plastic. 9, the lighting time, 10-14 hours a day. 10, the system life: more than 20 years wind&solar street lamp