1. MH digiatal ballast 2. Certificate:CE,UL,CUL,FCC 3. ... 70W,150W,250W,400W MH digital ballast for commercial lighting <70w technical dataModelMH-70W-ELighting Source TypeMH&HPS 70WInput Voltage220VInput voltage frequency50 ... with input voltage fluctuation·Long line drive, The ballast can be installed far away from lamp and ... diagram 35W,50W,70W,150W,250W,400W MH digital ballast for commercial lighting