This is a Philips MASTER TL-D 15W/840, 18 inch 15w T8 fluorescent tube in colour 840 - Cool White (4000K). The Philips MASTER TL-D Super 80 15w/840 T8 tubes are commonly used in linear fittings in schools, offices, shops, or in and around the home. These tubes have an average life of 20,000 hours and a lumen output of 1000 lumens and are fully dimmable when used with a dimmable ballast. Philips Manufacturer Number - 927922284014 Wattage - 15w Lumens - 1000lm Colour Temperature - 4000K Dimmable? - Yes Cap - G13 CRI - >80