Square LED surface-mounted luminaire with microprismatic cover plate PW19-X. Unique lighting effect due to an internal light gap and flatly illuminated light output. Internal light gap can be individually designed according to customer requirements. For installation on ceilings, walls and overhangs indoors. The optical system consists of a highly efficient PMMA cover with microprismatics. The microstructured PMMA prism surface of the optical system has an anti-glare effect, is non-yellowing and does not cloud. With symmetrically limited wide beam light distribution. Glare rating according to UGR classification (EN 12464-1) 80. Color location tolerance (initial MacAdam) = 3 SDCM. Average rated service life L80(tq 25 °C) = 100,000 h, average rated service life L90(tq 25 °C) = 50,000 h. The light source is replaceable in accordance with the ecodesign requirements (Regulation (EU) 2019/2020). The surface-mounted luminaire consists of a mounting body with connection unit, quick-connector and the operating device as well as an attached luminaire unit with LED system, cover plate, quick-connector and frame. Surface coated white (RAL 9016). Dimensions (L x W): 607 mm x 607 mm, height 42 mm. The frame is 3-dimensionally profiled. The undercut creates a shadow gap and reduces the perceived overall height. Protection class (EN 61140): I, protection type (DIN EN 60529): IP40, shock resistance level according to IEC 62262: IK03, test temperature glow wire test according to IEC 60695-2-11: 650 °C. Weight: 7.4 kg. The packaging concept of the luminaire allows the operating device to be removed separately for pre-assembly; the other components of the luminaire remain protected until final assembly. With electronic operating device, digitally dimmable (DALI). Operating device in accordance with DALI-2 standard (EN 62386). Luminaire can be switched and dimmed using a push-button function via DALI control terminals (Touch DIM). The operating device can be replaced in accordance with the ecodesign requirements (Regulation (EU) 2019/2020). Operating device is idle-proof and protected against incorrect connection, short circuit, overload and overtemperature. ENEC certification by an independent testing center is in preparation. The luminaire can be equipped with the Monitoring ready (MOR) functionality on request. The product meets the basic requirements of the applicable EU directives and the Product Safety Act and bears the CE marking. The luminaire is part of a range of recessed, surface-mounted and suspended luminaires that are coordinated in appearance. The product range's wide range of applications is further underlined by variants in the area of luminous flux packages, light distribution curves and protection classes. The basic range can be expanded to include project-specific luminaire features on request. Luminaire 10 years, spare parts (LED module, control gear, optical system) 15 years after the invoice date, subject to reasonable changes in the interests of progress.