Extremely slim, linear LED luminaire for wide-area room lighting in offices and workplaces, anodised aluminium support, diffuser made of matt acrylic glass, 192 conical indentations for directing light and reducing glare, suitable for workplace lighting in accordance with DIN EN 12464-1, approx. 98 % direct beam, version for 24 volts DC, designed for attaching to a surface-mounted housing with operating devices (to be ordered separately: surface-mounted housing with operating devices, switchable: 544-832, dimmable 1-10 V: 544-833, dimmable DALI/switchDIM: 544-834, dimmable CASAMBI: 547-810).