GE LED15UT8G-4-3CC-LT2, 2 Pack. This is a 15 watt, glass T8 with a bi-pin base. It is equivalent to both a 32w T8 & 40w T12 linear fluorescent. The bulb provides 1800 lumens and has a color temperature: 3500/4100/5000 Kelvins. With a CRI: 80, and an MOL: 1". The bulb is non-dimmable, with a rated life of 36000 hours. Universal - works with certain T8 & T12 ballasts, 3 color settings: 3500/4000/5000