1.80% energy saving 2.Certificate:UL,ROHS,CE,FCC 3.Life span:8000H 4.High quality with competitive price 2U-11W Energy Saving LampTechnical Data:1.Supply Voltage:100-130VAC/50-60HZ 220-240VAC/50-60HZ2.Light output: 580 lm3.Lumen maintenance at 2000 H : >85%4.CRI: >80%5.Color temperature: 2700K-6500K6.Life time: 8000 Hours7.Base: E27/B228.Available watts:5W,7W,9W,11W,13W,15W