Recessed sports hall luminaire Design: Closed recessed single luminaire, ball-resistant. Includes RIDI-LED lamp L-TUBE-B. Stable luminaire housing in white powder-coated steel, colour similar to RAL9016. End caps with additional break-off openings for mains cables or through wiring. Narrow frame in extruded sectional aluminium with panel in tough UV-stabilised PMMA. Frame held invisibly in the luminaire housing by spring catches, hinges down on both sides with automatic connection to the earth conductor. Colour rendering in index Ra >= 80, colour temperature 4000 Kelvin (840), other colour temperatures possible on request. Electronic converter for LED, 230 Volt, 0/50-60 Hz and internal connector block. Suitable for direct voltage operation and use in central battery systems. Mounting: Prepared for mounting in different ceiling systems using suitable fixing kit (accessory). When mounting using fixing kit 10-713 or 10-717, with 3 x ... Watt lamps or more, a 6-point fixture is required. As a set contains 4 parts, the required number x must be determined: X = (n x 6) / 4, whereby n = number of luminaires and result x is rounded up to the next highest number. Ball-proof ceiling surface mounting or pendant fixture of the 2, 3 and 4-lamp luminaires are only possible with 4-point fixture. When using trunking, 2 parallel rails are required for this. Note "ball resistant": RIDI luminaires with this sign are produced to the appropriate mechanical and photometric standards demanded for sports hall lighting. They comply with ball-resistant safety requirements according to DIN 18032, part 3 and have been tested for that purpose by the MPA or VDE. ESHL-L ... PSB Prismatic panel PSB made of PMMA, with external prisms. Reflector made of high-reflectance matt anodised super-purity aluminium with silver coating, symmetric beam.