Eterna 20W T4 580mm Fluorescent Bulb The Eterna 20 watt T4 fluorescent white 3400K tube, 12 mm diameter with 580 mm length including pins and 567 mm excluding pins are specifically designed for use with Eterna brand fittings. Please note fluorescent tubes do not come in standardized lengths so please make sure your tube is the same. Suitable for use with electronic ballast. The T4 G5 fluorescent tube offers longer life, improved energy rating and high-quality light. Can be used for under cupboard light fittings, pelmet or emergency light fittings. Technical Specification: Average Lifetime Hours: 10,000 Lumens: 1500 lm Colour Temperature: 3400K Colour Description: White Dimmable?: No Weight: 0.075kg Dimensions: Lamp Including Pins: 580mm Lamp Excluding Pins: 567mm You may also be interested in the 6W, 10W and 16W versions of this bulb.