1,Competitive price and good quality. 2,Safety. 3,Good after sales service. 4,Good design,easy to install . Item Shap NO. Watt (W) Volt(V) D*H,(mm) Base Life(h) ColorSDST45*80CL A15 15/25/40/60 110-130/220-240 45*80 E27/B22 1500 ClearSDST45*80FR A19 15/25/40/60 110-130/220-240 45*80 E27/B22 1500 Frosted A15/A19 General Clear/Frosted Round Bulb