Biro Circle Ring LED pendant light, Ø 45 cm with switchable ballast In the shape of a ring, the lampshade of the Biro Circle Ring LED pendant light is made of aluminium and closed at the bottom with an opal white plastic cover. This cover, in combination with the rotationally symmetrical deep-wide beam light distribution, ensures bright illumination and optimum light distribution. The Biro Circle Ring pendant light not only illuminates commercial areas such as offices or conference rooms and many more, but also a table or counter in a kitchen or dining room in private living spaces, - 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, service life L80/B50 at 25 °C: 153,000 h - housing material: aluminium / steel / plastic - permissible ambient temperature (ta): -20 °C - +25 °C - with electronic ballast, switchable, not dimmable