GE, F32T8/SPX35/ECO-LT12, This is a 32 watt, 4', T8 linear fluorescent lamp. It has a bi-pin base and is dimmable (via a dimming ballast). It provides 2800 lumens and has a white (3500 Kelvin) color temperature. The bulb has a 20,000 hour rated life and a CRI of 87. "ECO" denotes lower mercury.