... with CE,ROHS,SASO,KUCAS ,etc,international certificate. 1.Full spiral energy saving lamp 2.Good quality, 3Good service, 4.Good price ... 5.CCC,CQC,CE,ROHS,ISO9001:2000 certficate 1.full spiral energy saving lamp,energy saving lights,CFL,compact fluorescent lamp2.Diameter:17mm2 ... .Energy saving 80%3.Longer life time 8000hours ;guarantee one year. ...