The Newest Version 2 of Grow Crew Fluorescent T5 fixture is ideal for those looking to use a compact, low heat light with high efficiency. Comes ready with blue (6500k) bulbs. Each bulb is 54w, giving the unit a total of 432w of total light output. Grow Crew HO (high output) T5 fluorescent grow light fixture is an economical 4 foot light source produces up to 20,000 lumens, as much as a 250 watt metal halide, but with virtually no heat, eliminating the need for costly and space-hogging ventilation systems. Installed within are two programmed start 120 volt electronic ballasts. controlled by separate switches, allowing you to run two lamp types (vegetative and flowering) within the same fixture. The Grow Crew T5 Fluorescent light fixture is perfect for the starting or professional grower and can be daisy-chained to matching fixtures for nearly unlimited expansion. Use the supplied wire hangers to mount the light in any indoor location. Daisy Chainable - Up to 3 Fixtures Blue 6500k bulbs included perfect for lush growth Powder Coated Steel Housing Imported European 95% High Reflectivity Aluminum Reflector 120/v40/277 Operating Voltage Detachable 15 Foot Power Cord (120V included) UL Listed Growers House Bulb Choice Recommendations: Red (flowering) 3000k bulbs are sold separately. Combine with blue lamps for your particular plant requirements. Growers House suggests these combos and results. 8 Red: Flowering Phase 6:2 Red/Blue: Flowering Phase / Side Lighting for Flower 4:4 Red/Blue: Side Lighting for Flower 2:6 Red/Blue: Vegetative/Propagation Phase / Side Lighting for Vegetative 8 Blue: Vegetative/Propagation Phase