... 85%(35W), >87%(70W)Output current crest factor<1.2overload protectionyesshort-circuit protectionyesover warm protectionyes≥20000hours-15°C ... circuit, abnormal, moisture, lightning,Anti electromagnetic interference function.1, high quality, high reliability, long life. 2, ... power consumption, and low self heating. 4,Abnormal lamp automatically cut off the power 5, with overvoltage protection, to ...