Installation Recessed installation in suspended ceilings. Unventilated or ventilated ceilings. For installation in suspended ceilings with visible T-bars, VTB (24 mm) or one-piece suspended ceilings. Connection For permanent connection with 230 V; built-in LED ballast in luminaire. Single and Start luminaires in systems are equipped with 1.5 m connection cable 5 x 0.75 mm². System units are equipped with a change-over cable (5 x 1.5 mm²) and a quick-connector between the luminaire units. Use Configure for options on the type of connection cable and entry. Design Frame painted in white (RAL 9016), silver (RAL 7035 metallic) or black (RAL 9005). Endcaps included in Start/Single luminaires. Louvre Opal – opal plate in frosted acrylic (PMMA). Beta Opti Nano – side and cross blades in satin matte, metallised aluminium with an integrated opal surface that minimises the risk of uncomfortable glare from the LEDs and multiple shadows.