T3 Series energy saving lamps, 9w,11w,13w 18,21w, tube diaeter is 9mm ,life :8000 hours T3 Series energy saving lamps/cfl/low energy lightbulbs, compact and ultra bright....15w,18w,21w,23w,26w,28whalf spiral2700k,4200k,6500kTriphosphor , B22/E27Life upto 8000 hoursCE RoHS110V-127V/60Hz, 220V-240V/50Hz energy saving lamp energy save lamp