1x 22W OSRAM Dimmable 2GX13 4 Pin, T5 Round, 230mm Circular Light Bulb. 2GX13 4 Pin Base, Colour 4000K. Please note this lamp has 2 pins on the inside and 2 pin on the outside, if you need 4 pins on the inside we do also sell those in our ebay shop. Brand New 8,000 hours average lifespan; 4000K cool white. This bulb is dimmable These bulbs are approximately 228mm with a tube thickness of 16mm. Circular fluorescent lamps are low energy bulbs and one of the most popular choices for ambient lighting, particularly in areas such as corridors and stairwells. Being almost circular, they are a great alternative to linear fluorescent tubes; compact, bright, they provide a good all-around light. Product benefits: Excellent uniform illumination with no shadows. Areas of application: Public buildings, Offices, Restaurants, Industry, Shops, Supermarkets and department stores, Hotels. Product features: Good color rendering index. Single-ended round fluorescent lamp. Dimmable. Economical product. Good quality of light. Good luminous flux. Uniform illumination with no shadows. For operation on electronic control gear.