This is an Osram Dulux D/E 13w compact fluorescent lamp in colour 840 - cool white. This lamp has a G24q-1 cap. These lamps have an average lamp life of 10,000 hours and are often used in public buildings, offices, shops, supermarkets, hotels, restaurants and around the home. Specifications: Energy efficiency classes spectrum A++ to E Lamp power 13 W Luminous flux 900 lm Base G24q-1 Color rendering index CRI 80-89 Color temperature 4000K Diameter 12 mm Light color 840 Total length 131 mm Integrated starter no Amalgam technology no Color white Number of lamp tubes 2 Suitable for electronic ballast yes Mean rated life 20000 h