... Maintenance free 4.Life time25years Technical parameters of solar outdoor lamp Height: 6~11M, galvanized cone-shaped mast with coating ... 18W~150W low-pressure sodium lamp, high-pressure sodium lamps, halogen lamps, Xe lamps, pole-free lamps, energy-saving lamps, large-power LED, ... 30°c----55°c Solar panel: mono/multi-crystal silicon high-efficiency cell with service life ≥25 years Storage battery: ...