... a little circuit change).2, Ervan LED Tube sdopts the newest high efficiency chip and good heat dissipation aluminum board to ... hrs.4, Convenient to deliver. Ervan LED Tube sdopts special PC(Polycarbonate) plastic with soft light, it is unbreackable, shake- ... , Long lifespan: >50,000hrs4, High brightness, adopts high quality LED chip with about 24mA current.Very strict testing steps, and qualified rate ...