Range of single-ended, compact, high-efficiency, discharge lamps with a stable colour over lifetime and a crisp, sparkling light. 20W 3000K Warm White lamp with 12000 hour average lamp life Length 103mm / Diameter 19.3mm Warm or cool white colour impression Allows small-size luminaires designs that give high beam intensities High lamp efficacy results in low operating costs and low heat generation Must be used in closed luminaires with a hard-glass cover Must be used in combination with a ballast and an ignitor