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) ColorSDC7.5E12CL C7 5/10/15 110-130/220-240 24*53 E12 1500 Clear SDC9E17CL C9 5/10/15 110-130/220-240 30*75 E17 1500 Clear