4-Foot 6 Lamp 54W T5HO High Bay Fluorescent, Standard Specular (86%), Program Rapid Start
Amazon.com : HYDRO PLANET T5 Grow Lights 4 Ft 8 Bulbs Fixture with 6500K Fluorescent HO Bulbs, T5 Grow Lights for Indoor Plants, UL Listed, 15 ft Power Cord with Hanger :