Surface-mounted luminaire for clean rooms with high energy efficiency. Fraunhofer IPA Institute certified to ISO classes 1-3, according to EN14644-1, hygienic design up to GMP (Good Manufacturing Practices) class D. Multi-layered optics. The micro prismatic diffuser protects against glare. The insulating film ensures uniform light. The tempered protection glass provides a smooth surface for easy maintenance. Housing consists of two parts: the outer and inner casings. The outer casing is made of a 0,8 mm thick steel sheet. The inner casing carries electronic components and is connected to the construction of the diffuser carrier. The surface is protected with antibacterial epoxy-polyester white powder, which is resistant to detergents. The construction ensures complete sealing with the ceiling. The connection of the two parts with the spring plate system is sealed. Easy mounting. Steel cables provide additional security. Supplied with IP connector. Total lighting fitting power: 45.0W. Light color temperature 4000 K with color reproduction index of (CRI) >80. Led working life is 60000 hours, with condition that flux doesn't go below 90% of initial flux (L90B10/). Initial lighting fitting flux is 5550lm. Lighting fitting efficiency not below 123lm/W. Light color deviation (SDCM) less than 3. Emission degree is UGR < 19. Lighting fitting dimensions 600/600/109 A/B/H[mm]. Mechanical protection degree IP65. Lighting fitting is serviceable, as the LEDs and drivers of the fitting are replaceable by ZHAGA standard. Manufacturer has valid certificates: ISO 9001:2015, ISO 27001:2013, ISO 14001:2015, ISO 45001:2018, ISO 50001:2011. Lighting fitting type CLEAN ROOM CLA /C 600 /840, manufacturer Buck.