... led light 1, Power: 20w,TUV,UL 2, Double-sided PC cover 3, lockable rotating end cap 4, Isolated driver high lumen led light 1, Ervan LED ... hrs.4, Convenient to deliver. Ervan LED Tube sdopts special PC(Polycarbonate) plastic with soft light, it is unbreackable, shake-resist, and ... final explantion of aforesaid terms.Tubes in refrigerators high lumen led light with Double side pc lens certified by TUV