Half Spiral energy saving lamps, 12mm dia tube, 15w,18w,23w, 8000H Life, B22,E27,E14 Half spiral type energy saving lamps.Tube dia:9mm 11w,9w,7w,5w,3w High quality:PC PBT B22,E27,E14Cheaper quality:PP, Only USD0.52 3000 hoursHalf spiral:18w,23w,30w Tube diameter:12mmCape :E27,B228000 hours life. CE