Fulham Lighting WH7-230-L Workhorse 7-Versatile Fluorescent Ballast-Instant Start-230V-Linear Model w/Side Leads Electronic Ballast Workhorse Series Versatile, Solid State Electronic Ballast Small Case Size, High Power Factor, Light Weight Available In 120/230/277V 50/60 Hz. 230V dedicated voltage, Operates 41 lamps in 70 combinations. Use Fulham compatibility list to find your ballast.