Series: TRIONA rectangle Decorative rectangular LED surface-mounted luminaire. Flat, seamless frame: aluminium extrusion profile, powder coated. Cover made of sheet steel, powder-coated. Direct light emission through a diffuser made of non-yellowing plastic (PMMA) opal.Indirect light emission through a flush diffuser made of satin-finish plastic. LED backlight technology for homogeneous illumination of the entire light-emitting surface. Direct 70%, indirect 30% light emission. Suitable for Ceiling mounting, Wall (surface). Very easy installation thanks to plug-and-play connector system. Driver integrated. With Casambi smart+free Bluetooth control for wireless network and operation using Android / iOS devices, free app available for download. Direct/indirect light emission can be switched and controlled separately. Suitable for through-wiring. Colour: traffic white, matt (RAL 9016) Length: 1560 mm Width: 350 mm Height: 88 mm Lamp: LED Socket: without socket Colour temperature: 4000K Colour rendering index (CRI): 80 Light source: LED Socket lamp2: Without base Colour temperature: 4000K System power: 144 W Rated luminous flux: 18000 lm Beam angle Down: 108° / 107° Luminous efficiency: 125 lm/W Control gear: Dimmable Bluetooth converter Control gear: Konverter dimmbar Bluetooth Protection class: I Type of protection: IP 20