Application: The AQUA - N luminaires are industrial dustproof and waterproof fluorescent lighting fixtures, suitable for the lightening of premises with danger of explosion. The fixtures are certified in FTZU Ostrava-Radvanice (type examination certificate number FTZU 02 ATEX 0445). The lighting fixture consists of a few main parts: body of the fixture, reflector with equipment, sealing plug with bushing. Body: The body of the luminaire is formed by plastic tube with 4 mm thick wall which is produced from transparent polycarbonate. It guarantees good mechanical resistance against impact. The level of flammability of the material is B (difficult to flammability). The tube is ended off by the sealing plug with bushing M20x1,5, designed for the premises with danger of explosion. Reflector: The reflector of the fixture is shifted in the basic body. The reflector is produced from aluminium profile. The electric components are mounted on it. Special aluminium profile is used for cover of electrical parts. Electric equipment: The lighting fixtures are equipped with inductive or electronic ballast, three-pole (five-pole) connector terminal block and lampholders. System of fastening: The luminaire can be fastened on the ceiling, respectively on the walls, of illuminated space by means of four srews. It can be suspended on a cable by means of self-locking cable suspender or hung on a chain via suspension brackets. For changing of luminous source it necessary to push out bearing ribbon out of luminaire.