Concido 150 recessed downlighters from Riegens Lighting provide a stylish and energy-efficient solution to a variety of interior applications. They are designed for fast installation and available in three options — basic, socket or terminal block, or prewired. All are connected via a plug-and-play 3- or 5-pole connection system. Tri-arms enable them to be fixed into ceilings from 1 to 40 mm thick.