The Crompton Lamps T9 Circular Fluorescent Tube is a 40W triphosphor tube designed for decorative luminaires. It offers excellent energy efficiency and value for money, providing a crisp 4000K cool white output with consistent, flicker-free brightness. Measuring 400mm in diameter with a 29mm tube thickness, these bulbs are perfect for magnifiers, inspection lamps, and circular ceiling fittings. The GR10q 4-pin base allows for quick and secure installation, making it a hassle-free replacement for existing 4-pin fluorescent tubes, commonly used as 4-pin bathroom light bulbs. With an impressive lifespan of up to 10,000 hours, these tube lights reduce the need for frequent replacements, making them an economical choice for residential and commercial use. They are ideal for upgrading fluorescent bathroom light fixtures, tube light bulbs, or replacing circular ceiling lights. This fluorescent tube replacement is non-dimmable and should be used with standard on/off lighting fixtures. With a Colour Rendering Index (CRI) of over 80, this light tube provides accurate and natural colour representation, ensuring a well-lit environment with minimal colour distortion. These light tubes, also known as circline light bulbs, are suitable for various applications including professional workshops, beauty salons, medical inspections, and home lighting. They emit an evenly distributed, shadow-free light, making them ideal for detailed tasks and precision work. Ensure your lighting is reliable and efficient with this Crompton 40W circular fluorescent tube.