This is a 13w Biax D compact fluorescent from GE in a 4000k Cool White colour and G24d-1 cap type. The double turn compact fluorescent lamps are a replacement for incandescent lamps offering a higher efficiency and great energy savings. These types of compact fluorescent is perfect for shallow downlights and are often used in public buildings, offices, shops, supermarkets, hotels, restaurants and around the home. The 2-pin versions have integral starters and should only be used with switch start ballasts. The 13w Biax D boasts a 900 lumen output and a 12000 hours average lifetime. General Characteristics Wattage 13w Pins 2 pins Shape Quad Tube – 2 loops Lamp Base G24d-1 Colour 4000k – Cool White Equiv Wattage 75w Incandescent Lifespan 13000 hours Lumens 900 lumens Length 139mm Diameter 34mm