... mast with coating finish on the surface (design according to requirements)System voltage: DC12V/24V Lighting sources: 18W~150W low-pressure ... sodium lamps, halogen lamps, Xe lamps, pole-free lamps, energy-saving lamps, large-power LED, etc. Daily service hours: ... service life ≥5 years Battery box: molded, fully sealed to prevent water, excellent heat preserving performance, service life ≥20years ...