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 2.5 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. 303 and 440 - Connection in separate driver box. Snap-in terminal block 3x1.5 mmm² x2, onward connection possible. 5x1.5 mm² x2 when dimming. Can also be supplied with chassis mounted snap-in connector in the ballast where a T-splitter or mains cable and plug are possible. The luminaire body and driver are interconnected with a snap-in connector. Use Configure for options on the type of connection cable. Design Frame painted in white RAL 9016, silver RAL 7035 metallic or black RAL 9005. Endcaps included in Start / Single luminaires. Louvre 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.