1.Saving lamps 2.Half spiral (T2,T3,T4) 3.High luminous flux. Advance ballast design, relaible long life 4.CE/Rohs/CQC/GS Product ld: GSHS-S13WProduct Name: T3 Half Spiral Energy SavingWorking Voltage: 110V/220V,50/60HZColor rendering index : Ra75-85Power factor: 0.6Wattage:13wColor temperature: 2700-7000kCap : E27/B22Color box(L/W/H)cm:4.6*4.6*14.5Carton(L/W/H)cm:47.5*23*16.5Package(pcs/ctn):50