Phantom II, PHB2010 1000W Digital Ballast for MH or HPS Grow Lights, 120/240V Dimmable Completely silent, energy efficient, reliable, and lightweight 32 MHz fully integrated microprocessor keeps your setup running smoothly Hot restrike programming to protect the lamp and ballast in the event of the ballast turning off unexpectedly 4 way dimming with 60 percent, 75 percent, 100 percent, and super setting End of life lamp protection and LED indication