... /w,75Ra dimmable,>50000hrs 3 year warranty real U tube factory UL U tube T8 manufacturer AC120V-277V,18w,100lm/w,75Radimmable,>50000hrs3 ... year warrantyreal U tube factory Technology Parameter:ISO9001-2008 certified factory ... -72hrs for aging IC,compacitor,and resistor UL U bend tube T8 manufacturer