... -240V/100---132V 1.The led fluorescent lamp save power up to above 80%,the service life to times,longer ... than regular ones,don't need maintenance ,don't need aluays change new bulb,rtansformer half ... factory,shoppingmall,school,home etc.Installation: 1. Turn the power supply off2. Take the origin light tube off3. Uncover ... support cover7. Install the tube 8. Turn the power on 21W T8