These 13 Watt Double Turn 4 Pin G24q-1 D/E Type Bulbs from Crompton are a Low Energy PLC lamp available in a range of colour temperatures including Cool White (4000K), White (3500K) or Warm White (2700K). Tested to 10,000 hours and with Cromptons unique Spectra-Plus coating, these bulbs are triphosphor coated for excellent colour rendering, high output and a long life. Compact DE fluorescent lamps are commonly used in commercial and domestic luminaires such as downlights, bulkheads, pendants and other suitable energy saving applications. Suitable for dimming and use in emergency lighting. To be used with an external starter or electronic ballast, these high performance bulbs can be installed instantly on arrival to brighten up your home or business. Main Features: Energy Efficient Bulb Long 10,000 Hour Life Warm White, White, and Cool White Bulb Options G24q-1 4 Pin Cap Bulb Technical Specification: Volts: 240V Watts: 13W Cap Type: G24q-1 4 Pin Colour Temp: Cool White (4000°K) White (3500°K) Warm White (2700°K) Lumen Output: 900 initial output Burn Hours: 10000 Height: 131mm Diameter: 35mm Energy Saving Rating: A Dimmable?: No Specification Sheet Comes with a 10,000 Hour Manufactures warranty