... power150WPower Factor>0.95Rated FrequencyFn=50/60HzEfficiency>89%Output current crest factor<1.2overload protectionyesshort-circuit protectionyesover warm ... abnormal, moisture, lightning,Anti electromagnetic interference function.1, high quality, high reliability, long life. 2, its own power consumption ... affect the normal work. Hot 150W MH Ballast for HID Spotlight with Good Quality from Manufacture