Sunlite 30187-su f58t8/841 58w fluorescent t8 bulb, medium bi-pin, cool white the fluorescent 58 watt 4,100k cool white t8 high performance straight tube features a medium bi-pin base, provides a light output of 5,000 lumens at a color rendering index (cri) of 82 and can last an average of 24,000 hours. These lamp utilize a single and double coat phosphor system. Series lamps have an increased cri due to the use of tri-phosphors (rare earth phosphors). Tri-phosphors also increase the lumens/watt output of the lamp. These series lamps offer superior quality of lighting, increased energy efficiencies, and extend life.
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