we have our tube glass factory. all parts we make by ourself. so we can control the quality very well. ENERGY SAVING LAMPITEM NO.: SF11WMaterial: TRI COLORlight source: energy saving bulb lamp holder: E27,E14,B22 color: 2700K,6400Kpacking: 50pcs in one carton.plastic material: PBT, PP, PCcolorful box with customers design. welcome to visit our factory and showroom any time. energy saving lamp