This is an osram 2ft 11w substitube advanced led t8 tube with a g13 cap these lamps have an average life of 40 000 hours a lumen output of 1080 lumens colour 830 or 1200 lumens colour 840 or 865 and an a class energy rating these replacement led tubes will work on old style magnetic control gear without bypassing the ballast but the ballast must be bypassed when using in high frequency fittings the tubes are not dimmable and have a 150 degree beam angle