These Low-pressure mercury discharge lamps are given a special fluorescent coating to provide good colour rendering. They give relatively high efficacy, both initially when powered on and during its lamp lifetime. Its ability to maintain it high lumen maintenance, along with the many different shades, enables you to create warm white to cool daylight atmospheres. Having more lumens per watt, as well as better colour rendering than the standard TL-D version of lamps, these are ideal for those wishing to add a little more to their lighting experience. They also boast as having an extremely low mercury content compared to other 800 fluorescent tubes on the market, making them a safer option without compromising on luminosity. Features and Benefits: Highly efficient 3-band fluorescent coating giving great colour rendering High initial light output to give you bright lighting from the go Low mercury dose making these lamps safer than the standard fluorescent bulb