Installation In Lighting Track Pro (on/off) or Control Track (DALI). Adapter locks mechanically to the rail with a knob. Design Frame painted in white (RAL 9016) or black (RAL 9005). Louvre Opal – frosted acrylic diffuser (PMMA.) Beta Opti Nano– side and cross blade reflectors in satin matt, metallised aluminium with an integrated opal surface that minimises the risk of uncomfortable glare from the LEDs and multiple shadows. Light distribution Direct.