... reliable,low power consumption and long life span,especially for all kinds of roads,viaducts,industrial areas,residential,square ... factor:>0.8Power efficiency:>83%Condition temperature:-20--40degreeControl method:Build-in constant current driverWorking lifetime:30,000hs Features ... reliable,low power consumption and long life span,especially for all kinds of roads,viaducts,industrial areas,residential, ...