Sunlite 30225-su fb32/sp841/6 32w fluorescent t8 u-bend tube bulb, mini bi-pin, cool white the fluorescent 32 watt 4,100k cool white t8 u-bend tube features a mini bi-pin base, provides a light output of 3,000 lumens at a color rendering index (cri) of 83 and can last an average of 20,000 hours.