Flourescent bulb 1,watt:7/9/11/15/20/25w 2, ... 0.55 3,lifetime:8000h 4,certificate:CE,ROSH Flourescent bulb WattVoltageHertzPower factorColoe temCRILifetimeLumenBase7110/120v50-60Hz0.552700-6400k>808000h286E14/E27/ ... % higher than GB3,Long lifetime>=8000hours4,Brightness of the bulb is five times greater than a lamp of same wattage ... house, hotels, office,commercial buildings etc. CE ROSH Flourescent bulb