Hydrofarm Agrosun BUAG24 T12 Full Spectrum Fluorescent Tube, 20 Watt, 24 Inch Full spectrum fluorescent tube Ideal for seedlings, cuttings and low light plants like african violets Brighten any space and help chase away those winter blues Strongest full spectrum T12 fluorescent up to 20 percent brighter than other brands Tubes fit standard t12 24-inch fixtures