A ceiling-recessed troffer luminaire for offices. Two thermoformed, edge-illuminated side diffusers. A three-layer construction consisting of a reflecting layer, a fiber optic layer and a non-yellowing opalized PMMA diffuser. Centrally placed DARKPOINT optics consisting of opal lenses with 80° light distribution and a matte black, glare-reducing reflector. A central module that is CLICK-mounted in an extruded aluminum profile. The electrical connector on the top of the fixture shortens the assembly time. Tool-free power supply connection and luminaire mounting in modular ceilings. Available versions: with various central optics – WHITEPOINT, opal, microprismatic or louvre; with separate lighting control for the central and side modules Luminaire type: Troffers; Mounting type: recessed mounting; Mounting location: ceiling; Luminous flux: 4700lm - 6000lm; Maximum luminous efficacy: 143lm/W; Correlated color temperature: 4000K, 3000K ; Color rendering index (CRI): >80; Median useful life: L70 - 181000 h,L80 - 113000 h,L90 - 53000 h; Standard Deviation of Color Matching (SDCM): SDCM <3; Photobiological risk group: 1; Luminous intensity distribution direction: direct; Energy efficiency class: C; Frame color: white, smooth matte, RAL9016; Luminous intensity distribution geometry: symmetrical; Unified glare rating (UGR): 15 - 18; Angle 65° luminance: <2400; Voltage: 230V AC; Power: 35W - 42W; Wired lighting control: ON/OFF, DALI; IP Code: IP20; IEC protection class: I; Reflector material: PC; Reflector surface: black; Lens material: PMMA; Lens construction: single lens; Housing material: steel sheet; Luminaire shape: square; Permissible ambient temperature range: from 0°C to 25°C; Connector type: 3-pole, 5-pole; Dimensions: Height: 62mm, Width: 597mm, Length: 597mm, ; Weight: 6.00kg - 6.50kg; Registered design: Yes;