Highly economical recessed luminaire with progressive LED technology. Luminaire frame made of powder-coated aluminum. Recessed frame made of powder-coated sheet steel. Diffuser made of opal plastic. Diffuser and light guide made of non-yellowing plastic (PMMA). Lateral light coupling (RZB SIDELITE® technology) for above-average homogeneous luminance distribution. External control gear. Extremely simple installation of the control gear using a twist-and-plug system. Extended connecting cable (1.20 m).