Glare-free Biro Circle LED ceiling light, dimmable via DALI As the name suggests, the Biro Circle LED ceiling light is ring-shaped and made of high-quality aluminium, steel and durable plastic. Its opal white cover ensures that there is no glare effect. A wide beam angle in conjunction with the integrated, powerful LEDs also ensures good light distribution and good overall room lighting. And thanks to its modern design and first-class workmanship, the Biro Circle looks very elegant even when switched off - chromaticity tolerance (initial MacAdam): 3 - very wide beam angle (108 °) - glare-free thanks to opal cover - ballast included - externally dimmable via DALI