Apollo Horticulture 250 Watt CFL Compact Fluorescent Grow Light Bulb of 2100K for Plant Growing 1- 250 Watt Apollo Horticulture CFL Light Bulb / E39 Mogul Base Lumens- 9,750 Color Temperature- 2100 Kelvin Bulb Measures  14" x 5" x 5" 120V/60Hz