... Watt: 5W 7W 9W 11W Color temperature: 2700/6500K Life: 10,000 hours Certificate:CE Features Specifications: Energy saving lamp (Shanghai ... ,steady quality·PF :0.99,total harmonic waves less then 10%·100V-264V wide voltage operation,constant power output,pipeline start up ... time:8 years,3 year's life time of tube(10 hours a day)·Cold start under 30 degrees below zero ...