25-Pack T8 LED Tube,18W 2200lm(40W or Higher Equivalent), 5000K(Daylight), Work Without Ballast/AC120~277V, 4ft, Single-Ended Power,Frosted,Glass with Shatter Proof Coating,UL & DLC-Listed (25, 5000K) 5 Years warranty. 50,000 Hours life span, more than 27 years (Based on 5Hrs/day average). Save more than 50% on your electricity bill! Outstanding new generation GLASS tube design, Wide beam angle-220 Degree, Higher efficiency -Up to 150lm/W, Longer lifetime-up to 100,000 Hours Manufacturer direct sales! The manufacturer is the partner of the top lighting brands in USA. It is widely installed by offices, hospitals, supermarkets, schools and hotels national wide UL & DLC listed. All 4FT and 2FT tubes are DLC-listed and thus eligible for State and Nationwide rebate programs. For your safety the products are UL-listed to avoid electrical risk Warning! Ballast bypass required. Please use un-shunted tombstones to apply power to one end of tubes only.