... ,power factor:0.55 3,lifetime:8000h 4,certificate:CE,ROSH Flourescent bulb WattVoltageHertzPower factorColoe temCRILifetimeLumenBase7110/120v50-60Hz0.552700-6400k>808000h286E14/E27 ... >808000h1150E27/B2225110/120v50-60Hz0.552700-6400k>808000h1520E27/B221,CE EMC,ROSH,FCC,C-TICK approvals.2,Switching frequency is ... ,Applicable areas house, hotels, office,commercial buildings etc. CE ROSH Flourescent bulb