| Primary value | 750 - 1000 lux |
| Applies to | Architectural drawing offices · Engineering design rooms · Detailed inspection workstations |
| Exceptions | Fine inspection / colour matching → 1000-1500 lux |
| Measured as | Average maintained illuminance on the working surface. |
| Source | NBC 2016 — Part 8, Section 1, Table 1 ✓ Verified |
Drawing and design work involves fine line discrimination, colour judgement, and prolonged visual concentration. The 750-1000 lux range prevents eye strain and supports accurate work over an 8-hour day.
Architectural studios and design offices use task lighting (drafting lamps) over each workstation in addition to ambient ceiling lighting to reach the 750+ lux target.