Replacement Lamp (Bulb) for Agrobrite Desktop and Standing Lamps, 27W, 5400K, pack of 12This is a replacement bulb for Hydrofarm's FLF27D Desktop Plant Lamp. Save money on your electric bill with this 27 watt bulb. It has a C. R. I. (Color Rendering Index) of 80 85, gives as much light as an ordinary 150 watt bulb, but uses far less energy. Kelvin Temp: 5400K Lumens: 1,500 Bulb Life: up to 5,000 Hrs 4 pin base CFL light bulb (G10q)