Installation Recessed mounting in suspended ceilings. Only for suspended ceilings with visible T-bars (15 or 25 mm). Connection Connection to snap-in terminal block 3-way or 5-way, 2,5 mm2. Can also be supplied with mains cable and earthed plug. Can also be equipped with the Wieland or Wago connection system. Design Body of white enamelled (RAL 9016) sheet steel. Openings along the entire body, outside the edge of the louvre for flow-through ventilation. Louvre Beta Opti – double parabolic side and cross reflectors in satin matt, metallized aluminium with ex-cellent reflective properties (>92 %), integrated into a single unit. Integrated in the unit, an acrylic (PMMA) diffuser film to create optimised light technology properties.The louvre in its standard design is equipped with protective foil over the light opening. The protective foil is easily removed after final cleaning/installation.