Bulbrite FC8T9CW 22-Watt Circline Fluorescent T9 Bulb, 4100-Kelvin, G10q Base, 8-Inch Diameter 1150 lumens Long Life (10,000 hours) 8-Inch Diameter Energy Wiser Circline bulbs available in 6-Inch, 8-Inch, 9-Inch, 12-Inch, and 16-Inch Diameters TCLP and ROHS Compliant