... 4, ambient temperature: -50 degrees to +70 wind&solar street lamp1, solar panels made by ourselves2, microcomputer intelligent impulse control, light control ... 4, ambient temperature: -50 degrees to +70 degrees 5, for rainy days, 10 days -15 days. 6, light sources and ... efficient high-power LED. 7, special waterproof battery solar lamps. 8, lamps: computer design, die-casting aluminum, ...