... building, commercial place, etc.(mounting height is suggested to be 9 meters and above) Applicable light source: ... Ultra – Long life up to 60000H10. Energy Saving : save up to 40 % compared to metal halides, 5 times ... more efficient than incandescent light bulbs, and up to twice as efficient as compact fluorescent lights.11 ... interest or question,please feel free to contact my trade manager:cn220021486