This is a Philips MASTER TL-D 58W/840, 5ft 58w T8 fluorescent tube in colour 840 - Cool White (4000K). The Philips MASTER TL-D Super 80 58w/840 T8 tubes are commonly used in linear fittings in schools, offices, shops or in the home. These tubes have an average life of 20,000 hours and a lumen output of 5240 lumens and are fully dimmable when used with a dimmable ballast. Wattage - 58w Lumens - 5240lm Colour Temperature - 4000K Dimmable? - Yes Cap - G13 CRI - >80 Did you know you could reduce your energy consumption by up to 50% by converting to LED? You can see our LED equivalents in the related products tab below.