Insert luminaire for ceiling systems with visible support rails. Housing made of powder-coated sheet steel. Luminaire frame made of powder-coated aluminum. Diffuser made of non-yellowing plastic (PMMA), microprismatic. LED backlight technology for homogeneous illumination of the entire light-emitting surface. External control gear. Second cable entry for mains transmission. With AC-Control monitoring module for LUXIFAIR central battery systems. Extremely simple installation of the control gear thanks to the twist-and-plug system. Extended connection cable (1.90 m). Excellent for office areas (UGR