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