Warehouse Lighting: The Stakes Are High
Poor lighting in a warehouse isn't just uncomfortable — it's a safety and productivity risk. Inadequate illumination leads to picking errors, accidents, and fatigue. Over-lighting wastes energy and budget. Getting it right requires understanding the standards, the space, and the technology.
EN 12464-1 Requirements for Industrial Spaces
| Zone / Task | Maintained Illuminance (Em) | UGR Limit | CRI Minimum |
|---|---|---|---|
| Storage areas (bulk) | 100 lx | 25 | 60 |
| Storage areas (picking) | 200–300 lx | 25 | 60 |
| Packing and dispatch | 300 lx | 25 | 80 |
| Loading bays | 150 lx | 25 | 40 |
| Inspection / QC | 500–1,000 lx | 19 | 80–90 |
Selecting the Right High-Bay Luminaire
The key parameters for high-bay selection are mounting height and required lux level:
- 6–8m mounting height: 100–150W LED high-bay, wide beam (90–120°)
- 8–12m mounting height: 150–200W LED high-bay, medium beam (60–90°)
- 12–20m mounting height: 200–300W LED high-bay, narrow beam (45–60°)
Aisle Lighting Layout
For racked storage areas, luminaires should be positioned directly above aisles rather than above rack tops. This maximises vertical illuminance on rack faces (critical for barcode scanning and label reading) while minimising the number of fixtures required.
Rule of thumb: Luminaire spacing should not exceed 1.5× the mounting height for uniform illumination (spacing-to-height ratio ≤1.5).
Motion Control for Energy Savings
Warehouses are ideal candidates for occupancy-based dimming. A typical strategy:
- Default output: 30% (standby mode)
- Motion detected: ramp to 100% within 1 second
- No motion for 5 minutes: ramp back to 30%
- Typical energy saving: 40–60% vs. always-on operation
Emergency Lighting Requirements
EN 1838 requires maintained emergency lighting along escape routes at a minimum of 1 lux (anti-panic: 0.5 lux). For warehouses, self-contained emergency LED luminaires with 3-hour battery backup are the most practical solution.