Use cfl's for veg and use a digital ballast for bloom, they even come with 220v that use very little power compared to a mag ballast. Cover the visual, stench and noise aspects and who is to say you don't have 2 deep freezers, elect stove, water heater, dryer, baseboard heaters...on and on..they all pull MAD amps. Cut back on all unnecessary usage and your gig should make up the diff.