Feartures 1.High lumen and long lifespan base on the normal sodium lamp 2.Lumenious efficiency 10%~15% higher than noraml,over 24000 hrs lifespan 3.The metal antenna ceramic tube ensures the starting performance under high pressure 4.Long lifespan decrease the maintance cost 5.Could replace the normal sodium lamp directly 6.New base design is more Eco-friendly than traditional base 7.UL, CE, RoHS ,FCC listed http://www.unigreen-tech.com/