This is a 18w Biax D compact fluorescent from GE in a 3500k Standard White colour and G24d-2 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 18w Biax D boasts a 1200 lumen output and a 12000 hours average lifetime. General Characteristics Wattage 18w Pins 2 pins Shape Quad Tube – 2 loops Lamp Base G24d-2 Colour 3500k – Standard White Equiv Wattage 100w Incandescent Lifespan 13000 hours Lumens 1200 lumens Length 154mm Diameter 34mm