Main Technical Parameter luminous intensity: 1600cd luminous time frequence: 40 flash/min usefu lifespan: 1×108 rated power: 12w working enviorment temperature: -40°C +70°C grade of sealing: IP65 weright(kg): 32 Applicable Scope Apply to obstacles which have no power or cables, such as TV tower,airports, iron towers Installation Requirement Make sure the solar battery panel is up to south 40 degree, and can’t be away from sun by other objects. Principle In daytime, solar energy charge the battery, and at night, the battery charge obstruction light to work