1.low energy,high output; 2.certificate:CE,RoSH; 3.lamps warranty ... :Small size, no black spot and shady area,good for down light.With excellent tri-color tube,hight lumens and ... and prevent short sight.8 times lumens than normal incandescent lamp.6 times lumens to normal incandescent lampWorking voltage:170- ... 250AC/50-60HZRated working voltage:220VAC/50-50HZSuitable for: shops ,houses ,office, etc.