Bring the sunlight back to your Sunlight lamp with this 27W Tube Bulb! Save$$$$ on your electric bills! The high-tech 27-watt-bulb, with 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, The bulb can last up to 5000 hours, 5x longer than other bulbs- for years of normal use, What is the KELVIN Temperature? The Kelvin temperature is 6500K, How many Lumens does it give off? The bulb gives off 1300 LUMENS Works with model numbers 72-0820-QL, 72-0890-QL, 72-1242S-QL, 72-1438-QL, 72-0813-QL, 72-0893-QL and 72-0925-QL Replacement instructions included SKU: TC72-TUBE-QL-4