Standards
General lighting — 300-500 lx at workstations; UGR ≤ 19; CRI ≥ 80. For detailed work — 500 lx with local lighting.
Luminaire selection
LED panels 36-60 W (4000-5000 lm) for Armstrong ceilings. Track for accents. Emergency — with batteries, 1-3 hours.
Placement
Rows along the windows with the spacing ratio ≤ 1.5 of the height. Near the monitor — parallel to avoid glare on the screen.
Control
Scenes, daylight sensors near the windows, presence sensors in utility rooms — savings of 30-50%.
Emergency lighting
Routes and exits: 1-3 hours of battery; the scheme with pictograms is mandatory for offices from 50 people.
Why design
The lumen method in GorkyCAD counts the fixtures and checks LPD — the office passes the audit without rework.