Eterna 28W CFL GR10q 4 Pin 2D Bulb The 28 Watt DD Style 4-Pin CFL Fluorescent Lamps by Eterna is available in a 3500K White Colour Output. These bulbs are generally used in slim profile decorative and exterior light fixtures in both domestic and commercial applications as they offer instant illumination and high colour rendition. With a 2050 initial lumen output, these sturdy bulbs have been tested up to 10,000 hours of life. Main Features: 10,000 hour average life 82/1B colour rendering index/group GR10q 4 Pin Cap Internally fused for safety Technical Specification: Watts: 28 Volts: 240V Bulb Cap: GR10q 4-Pin Colour Temperature: 3500K Colour Description: White Initial Lumen Output: 2050 Dimensions: Height: 200mm Width: 200mm Depth: 32mm Energy Rating: A Lifespan: 10,000 Hours Dimmable: No Ballast Required: Yes Driver Required: No Transformer Required: No Specification Sheet Note: Separate ballast/c