... saving environmental protection.2). Two circuits output, light control and time control, automatic open, turn off ... level IP54Service life(year)above 152).Solar panels, light source, and other ancillary equipments ITEMREMARKSolar panelsmonocrystalline silicon, ... service life 20 yearsbatteryhigh-performance, maintenance-freeLED light sourceLuminous efficiency:90Lm/W,life above 50000 hourslampProtection ...