Diffuser luminaire Design: Panel mounting luminaire, protection rating IP 54. Galvanised steel housing with welded and sealed end pieces, white powder coated, colour similar to RAL 9016 with black edging. Durable rubber gasket glued in place and strong diffuser retention clips guarantee a tight diffuser seal. For RIDI-TUBE lamps (order separately). Electronic DALI converter for LED, 230 Volt, 0/50-60 Hz and internal connector block. Mounting: Mounting in 100 x 100 or 200 x 200 modular metal panelled ceilings with the supplied fixing brackets. Not suitable for panelled ceilings with filler strips. EPF-R ... O Opal acrylic diffuser in UV-stabilised PMMA. For lamp RIDI-TUBE, recommended cover: clear.