The light source adopts single high power LED light source, imported high brightness semiconductor chips. Thermal unique and lamp shell design, effectively will heat conduction diffusion, thus decreasing the lamp in the body temperature, safeguarding the LED light-source 50,000 hours using life. According to every light 11-12 hours calculation, LED courtyard lamp in 12 years without replacement. Obvious power-saving efficiency. Use powerful LED light source and high efficiency imported LED driver. Compare with sodium lights, it can save electricity around 60%. Input Voltage:AC85-265V/DC12-24V Output Voltage :DC40V L E D Power :48w Consumption :12W*4 Luminous Flux : 5180-5785LM Color Temperature : Pure white:5000-7000k Warm White:3000-4000K