... white 4200K-cool white 6500K-daylight4.Average lifespan :8000Hours5.80% energy saving6.Optional Base :E14,B15,E27,E26,B227.Plastic housing ... .Flicker free and instant start C, 23W E27 FULL SPIRAL CFL 9000K APPS:( House,Office,Restaurant,Classroom,Workshop,Factory,Shop,Washroom ... PACKAGE:(COLOR BOX,FOAM,BLISTER...)E, 23W E27 FULL SPIRAL CFL 9000K CERTIFICATE ( ISO 9001, CE, ROHS.) 23W E27 FULL SPIRAL ...