Sunlite 30025-su f30t12/dl 30w fluorescent t12 bulb, medium bi-pin, daylight the fluorescent 30 watt 6,500k daylight t12 straight tube features a medium bi-pin base, provides a light output of 1,750 lumens at a color rendering index (cri) of 62 and can last an average of 8,000 hours.