Fluorescent Dimmer for use with Magnetic BallastFluorescent Magnetic Slide DimmerIvory Slide Dimmer with Slide to On/Off600 VA / 10 LampsRated 120 Volt AC, 60 Hz, 600 Watt, Single PoleFor use with multiple 40 Watt Rapid Start LampsUse with the following ballasts: (Not Included)Manufacturer / Ballast Part Number / Maximum Number of 40 Watt Rapid Start Lamps:Magnetek / 550L-TCP / 12 LampsMagnetek / 502A-TCP /12 LampsAdvance / DIM 140H-TP / 10 LampsAdvance / DIM 240H-TP / 10 LampsValmont / 8G5001W / 12 LampsValmont / 8G5007W / 12 LampsLithonia LightingSLD 600 F 120 IV – 365696