Recessed ceiling downlights with various LED outputs, half beam angles and dimensions for installation in suspended ceilings. Using the appropriate installation housing, the luminaires are also suitable for installation in concrete ceilings. The crystal glass projecting beyond the ceiling trim ring has a partial matt finish on the inside for optimum glare suppression and directs a part of the light sideways onto the ceiling. This creates additional visual comfort and a brilliant appearance through the intensity of the horizontal illuminance.