Naturalight energy saving daylight circular tube - 28w (150w tungsten equivalent). Daylight Naturalight circular tubes produce a high-quality light source that helps to reduce glare and makes tasks like sewing, reading and writing much easier on the eye. Naturalight tubes last up to 10 times longer than ordinary bulbs and consume up to 75% less energy! Suitable for the Daylight 7" Magnifying Lamp (DN1030)