The U23 lends itself perfectly to the lighting of spaces where clearance is limited and, in addition, combines high output and lumen maintenance. Light distribution on luminaires with opal optics has been optimised to achieve pleasant, even lighting, in corridors or stairwells, for example. U23 luminaires are also available in an IP54 version (on bottom), as a result of which the luminaires can also be applied in demanding environments such as kitchens and sanitary spaces.