... nees a little circuit change).2, Ervan LED Tube sdopts the newest high efficiency chip and good heat dissipation aluminum ... :1, Double-sided PC Cover2, Latest lockable rotating end cap, newest attractive and unique design3, Isolated power supply4, Euripean safety ... no mercury.3, Long lifespan: >50,000hrs4, High brightness, adopts high quality LED chip with about 24mA current.Very strict testing steps ...