Biro Circle Ring LED pendant light, DALI dimmable, CCT, ring height 3.5 cm The Biro Circle Ring LED pendant light, designed as a flat ring, is equipped with a DALI dimmable ballast and a CCT function for infinitely variable adjustment of the light colour. The light with rotationally symmetrical, narrow-wide beam light distribution and an opal white plastic cover offers very high system efficiency and produces light that is evenly distributed throughout the room. It is specially designed for use in offices or conference rooms - CCT function, light colour changeable in the range warm white 2,700 K - daylight 6,500 K - general colour rendering index CRI > 80 - service life L70/B50 at 25 °C: 276,000 h, service life L80/B20 at 25 °C: 153,000 h - housing material: aluminium / steel / plastic - permissible ambient temperature (ta): -20 °C - +25 °C - with electronic ballast, tunable white, DALI dimmable