How Many LED High Bays Do I Need in 2025?
Updated Sept 2025
LED High Bay Lights are the go-to option for many commercial and industrial areas with ceilings over 5m, for example Warehouses, Factories, Garages, Distribution Centres and more.
Because they are so widely used, the correct number of fittings is crucial to achieve safe, comfortable and efficient lighting. Too few fittings leaves dark spots, while too many wastes energy and increases costs.
Use our simple High Bay quantity table below as a starting point based on typical room dimensions and installation height. For large projects especially, factors such as mounting height, lumen output, beam angle, and task requirements all influence the final lux level. For recommended lux by task, see our Industrial Lighting Lux Levels guide.
For the most accurate answer, request a free custom lighting design.
Benefits of LED High Bays
- Energy savings: Up to 70% lower running costs vs. Metal Halide or SON.
- Low maintenance: Long lifespans reduce replacement and downtime.
- Better light quality: Instant-on and higher CRI improves safety and productivity.
- Smart controls: Motion/daylight sensors and dimming for extra savings.
- Fit for purpose: UFO and linear formats for open areas, aisles and production lines.
Considerations (Drawbacks)
- Upfront cost: Quality LED high bays are an investment, though typical payback is 1–2 years.
- Design matters: Incorrect spacing or wattage can cause shadows or glare.
- Ceiling height: Below ~5m, other formats (e.g., panels/linear) can give better uniformity.
How Many High Bays Do I Need?
This table is a general guide — assumptions are based on 6m mounting height using a 150W UFO High Bay (≈22,500 lm / 150 lm/W). Target illuminance at working plane (0.75m): 300 lux. For typical lux requirements by activity, refer to our Industrial Lighting Lux Levels guide.
| Area (m) | 10m | 15m | 20m | 25m | 30m |
|---|---|---|---|---|---|
| 10m | 4 | 4 | 6 | 6 | 9 |
| 15m | 4 | 6 | 9 | 9 | 12 |
| 20m | 6 | 9 | 9 | 12 | 12 |
| 25m | 6 | 9 | 12 | 16 | 16 |
| 30m | 9 | 12 | 12 | 16 | 20 |
Example: A 20m × 20m area requires around 9 × 150W UFO High Bays to achieve 300–500 lux evenly across the space.
Project Examples & Solutions
- Warehouse lighting solutions — high ceilings, racking aisles and open bays.
- Office & ancillary areas — reception, packing, QC and mezzanines.
FAQs
What height should high bays be used at?
Typically above 5m. Below this, panels or linear fittings may provide better uniformity.
How do I choose between 100W, 150W or 200W?
It depends on mounting height, reflectance and task lux. Share your space dimensions and we’ll recommend the right wattage as part of a free design.
Can high bays be dimmed or used with sensors?
Yes. Most modern LED high bays support 1–10V dimming and can pair with motion/daylight sensors to reduce energy use when areas are unoccupied or bright.
What lux do I need in warehouses or factories?
General warehousing often targets ~200–300 lux; picking/packing and production areas may need 300–500+ lux. See our Industrial Lighting Lux Levels guide and request a free design to confirm for your site.
Summary
Seven LED supplies a wide range of LED High Bays suitable for warehouses, factories and industrial environments. For a precise answer on how many fittings and which wattage you need, request a free lighting design today.