Luminary adapted to be mounted on 600 x 600 mm module ceilings. It is equipped with highly efficient LED sources of the newest lighting generation, with the average durability of 50000 h. LED lighting stream is 2700 lm, 5400 lm or 10800 lm. Its color temperature is 3000 K (warm white color) or 4000 K (neutral white color). Diffuser is made from white polymethyl methacrylate with the light transparency greater than 70%, or from polymethyl methacrylate with micro prism structure, with the light transparency greater than 90% (micro prism part of diffuser is the outer side of the luminary). Diffuser is located in a steel frame which is powder coated in white. The frame is mounted to the luminary body by the use of springs. There is no need to use any extra tools to mount or dismantle the luminary. The body is made from steel sheet which is powder coated with mixture of thermostatic synthetic resin, hardeners, and pigments, all resistant to UV radiation. Luminary resistant to solids, dust, and liquids penetration (IP20/44).