Bulbrite FC9T5 841 22-Watt Circline Fluorescent T5 Bulb, 800 Series, 4100-Kelvin, 2GX13 base, 9-Inch Diameter 1900 lumens Long Life (10,000 hours) 9-Inch Diameter Energy Wiser Circline bulbs available in 6-Inch, 8-Inch, 9-Inch, 12-Inch, and 16-Inch Diameters TCLP and ROHS Compliant