This Ushio 42 watt bulb has triple tube 4-pin bulb with a GX24Q-4 base. It has a color temperature of 4100K and a rated life of 10, 000 hours. The overall length of this bulb is 6.7 inches and is 82 CRI. This bulb has a luminous flux of 3200LM, and this bulb is dimmable.