LuxStar T5 4' x 8 Bulb Fixture w Grow Bulbs b lite 20ft x 300ft Size We have redesigned Aeromixer 20ft x 300ft Size DESIGNED TO WORK WITH B Lite Master Zone Controller (Not Included)FEATURESDimmable Settings (200W 350W 450W 660W)Advanced Dimmable feature with Use of External B Lite Master Zone Controller (1W 660W)Automatic Frequency AdjustmentFull Circuit ProtectionRF ShieldingTECHNICAL SPECIFICATIONSInput Voltage: 100V 277VACInput Power: 660WPower Factor: 120VAC Full Load =90%PPF: 1700 µmol sEfficacy: 2 The LuxStar T5s use high efficiency digital ballasts and high output bulbs to create the most efficient light source These fixtures also emit significantly less heat than other reflectors so they can be placed closer to the tops of plants