This 9 watt fluorescent bulb. It has a base of G23, a color rendering index of 85 and a abbreviation name of CF9S/841. This bulb has a color temperature of 4100k, a diameter of 0.50 inches and a lumens of 600. It also has a maximum overall length of 6.60 inches, a rated life of 10, 000 hours and a single tube 2-pin shape.