Lightingwise 2 FT 3000K T5 HO Fluorescent Grow Light Bulbs - Pack of 1,4,8,20,40 (40, 3000k - red - bloom) Choose between qty's of 1,4,8,20,40 24W T5 Light Bulbs Choose between color temperature - 6500k or 3000k Light output: 2500 Lumens Dimensions: 1.8 x 23.2 x 1.8 inches