F20T12/CW Bulb - 20W T12 Fluorescent Cool White
"This F20T12/CW is a fluorescent lamp that uses 20 watts. It has a T12 lamp shape, and a G13 base. It has a 4150K color temperature, and a color rendering index of 60. The bulb has 1150 initial lumens, and an average rated life of 9000 hours."