Clear answer
Clear answer, explained.
High-bay (6–12 metres) : Typically uses fixtures in the 15,000–40,000 lumen range Ultra-high-bay (12–20+ metres) : Requires 40,000–100,000+ lumens for adequate ground-level visibility The goal is to achieve appropriate lux levels (e.g. 200–500 lux depending on the task) with uniform distribution. Beam angles and fixture spacing are just as important as lumen output to ensure consistent coverage without dark spots or glare.
Key points
What this means in practice.
- High-bay: 15,000–40,000+ lumens per fixture
- Ultra-high-bay: 40,000–100,000+ lumens
- Depends on ceiling height and application
- Target lux levels typically 200–500 lux
- Beam angle and spacing critical for uniformity
- Lighting design ensures safety and efficiency
When this applies
Best-fit environments.
- Warehouses and distribution centres
- Manufacturing and production facilities
- Logistics hubs with high ceilings
- Industrial buildings with high-bay or ultra-high-bay lighting
Q·01
