... 000 hrs.4, Convenient to deliver. Ervan LED Tube sdopts special PC(Polycarbonate) plastic with soft light, it is unbreackable, shake-resist ... Long lifespan: >50,000hrs4, High brightness, adopts high quality LED chip with about 24mA current.Very strict testing steps, and qualified rate ... explantion of aforesaid terms.Tubes in refrigerators high lumen led light with Double side pc lens certified by TUV