Surface-mounted luminaire Design: Square surface-mounted luminaire consisting of LED-optimised PMMA square tube with pre-diffuser to ensure homogeneous luminance density distribution and LED carrier made of section extruded and anodised surface-mounted profile with integrated control gears. End caps made from die-cast aluminium, polished and coated with protective lacquer or alternatively white powder coating. High degree of system efficiency thanks to mid-power LED chips assembled inhouse.