T8 5FT Tubes Fluorescent 58W Replacement Daylight / Warm White / Normal / Cool - BRANDED T8 fluorescent tubes are energy-efficient fluorescent lamps. They meet standard T8 sizing, which means they are tubular with a 26 mm diameter. These fluorescent tubes feature a G13 base. They feature proven lamp technology and are an economical and efficient solution. Fluorescent tubes give off a brighter light than halogen bulbs. They have low running costs and a long lifespan so no need to worry about replacements making them suitable for a number of applications. When choosing a fluorescent tube the number of lumens (Im) is important as the higher the number of lumens the brighter the bulb will be. - Proven lamp technology - Good economy thanks to high efficiency - Available in many.