This is a 18w Biax D/E compact fluorescent from GE in a 3500k Standard White colour and G24q-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 4 Pin versions are designed primarily for use with high frequency ballasts or in emergency lighting applications. The 18w Biax D/E boasts a 1200 lumen output and a 13000 hours average lifetime. General Characteristics Wattage 18w Pins 4 pins Shape Quad Tube – 2 loops Lamp Base G24q-2 Colour 3500k – Standard White Equiv Wattage 100w Incandescent Lifespan 13000 hours Lumens 1200 lumens Length 145mm Diameter 27mm