Biro Square LED pendant light with electronic ballast, on/off The square Biro Square LED pendant light from BRUMBERG was designed especially for lighting office spaces, but can also be used to illuminate kitchen counters or dining tables in the home. The light is suitable for direct connection to 230 V as it is equipped with an electronic, switchable ballast. The light cannot be dimmable. Equipped with an opal white cover made of plastic and with rotationally symmetrical deep-wide beam light distribution, it ensures high luminous efficiency and optimum light distribution - general colour rendering index CRI > 80 - housing material: aluminium / steel / plastic - permissible ambient temperature (ta): -20 °C - +25 °C - with electronic ballast, switchable, not dimmable