Tri-phosphor fluorescent, more than 55lm/W, 100V~200V wide voltage range, 50Hz ... 60Hz, conserve 80% energy Article name: Full Spiral Energy Saving Lamp Power: 5W, 7W, 9W, 11W, 13W, 15W, 18W, 20W, 23W ... per carton or 50pcs per carton Full Spiral Energy Saving Lamp