This is an energy efficient BELL 38w 2D also known as a CFL Square lamp with a 4 pin base (GR10q) in colour cool white - 840 (4000K). This lamp has 2700 lumens with a 10,000 hour average lamp life. If you have a 38w 2D lamp which has a GR10q (4-Pin) cap type and you are looking for a cool white light, then this is a perfect replacement for any fitting with those requirements. These types of lamps are used in garden light fittings, indoor bulkheads for corridoors, and various types of bathroom light fittings. In order to remove these lamps, simply pull them directly away from where the fitting is mounted in a forward motion. See Pins in the images for reference. The dimensions for this lamp are: 205mm x 205mm x 30mm. If you happen to find this lamp cheaper elsewhere then please call us to match and often beat any price you may find.