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