... , 50Hz or 60Hz 2.conserve 80% energy 3.CE , RoHS Article name: Half Spiral Energy Saving Lamp Power: 5W, 7W, 9W, ... Our company has first-class testing equipment and professional R&D team . As the leading products , energy saving lamp series , LED lamp series ... alike ,through the ISO9001 certification ,CE , ROHS, CSA , the energy efficiency rating certicicate and others . Half Spiral Energy Saving Lamp