1.4 phase mannual dimming:110%,100%,75%,50%. 2.Low working teperature 3.Good protection of short circuit 400W Dimmable E- ballastTechnical information 1.Other power also available:250W,400W,600W,1000W2.Rated input voltage and frequency:120/240V AC,50Hz-60Hz3.Working temperature:-30°c- 70°c4.Power factor:>0.995.Current crest factor<1.5Features:1. Operate both HPS and MH lamps 2. Offer high ...