If you want to properly calculate the commercial lighting in an industrial hall, it is not just about the number of lights. You want sufficient lux on the work floor, an even light distribution between shelving, and fixtures that suit the height, dust level, and activities in the hall. A quick calculation based on square meters is a great start, but for a reliable outcome, you also need to account for mounting height, beam angle, maintenance, and light loss.
Below you will read step-by-step how to calculate the correct lighting for an industrial hall. You will receive a practical formula, guideline values for lux, an explanation of highbays, lowbays, and light lines, and a simple way to factor in energy savings as well. If you subsequently need an exact breakdown per zone, LedLoket can support commercial projects with personal advice or have a lighting calculation made.
Start with the function of the hall
The right amount of light depends on what happens in the hall. A storage hall with wide aisles requires less light than a production area, order-picking zone, or workplace where precise inspections take place. Therefore, it is wise to first divide a hall into zones. Think of storage, shipping, walking routes, assembly, and technical areas. You then determine the desired lux value per zone. If you are looking for specific guidelines for warehouses, please view our Warehouse lighting advice.
The table below provides practical guideline values. These are not rigid laws for every situation, but they do serve as a useful starting point. For specific workstations and project specifications, it is advisable to take the applicable standards and operational requirements into account.
| Zone in the industrial hall | Target value | Practical starting point |
|---|---|---|
| Walkways and basic storage | 100-200 lux | Sufficient for safe orientation and general movement |
| Warehouse with order picking | 200-300 lux | Suitable when products need to be read and processed |
| Shipping and logistics work zones | 200-300 lux | Important for speed, safety, and error reduction |
| General production or assembly | 300-500 lux | Suits active and visual work on the floor |
| Fine assembly, inspection, or quality control | 500-750 lux or higher | Required for detailed work and visual accuracy |
The practical formula for an initial calculation
For a quick initial estimate, you can start with a simple formula:
required lumens = surface area in m² x desired lux
A hall of 1.000 m² with a desired light intensity of 300 lux theoretically requires 300,000 lumens on the work floor. That is useful as a rough starting point, but in practice this outcome is too simple. After all, not all light from a fixture ends up usefully on the floor.
For a more realistic calculation, therefore, use this formula:
total lumens required = surface area x desired lux/(utilization factor x maintenance factor)
- Utilization factor: the portion of the light that actually ends up in the right place. This factor depends on the choice of fixture, beam angle, height, reflection of walls and ceiling, and the layout of the hall.
- Maintenance factor: correction for dirt, aging, and light depreciation over time. In a clean hall, this is higher than in a dusty production environment.
A practical example: suppose that for a warehouse of 1.000 m² is based on 300 lux, a utilization factor of 0.7, and a maintenance factor of 0.8. The calculation then becomes 1,000 x 300/(0.7 x 0.8) = approximately 535,700 total lumens. If you then choose fixtures of 30,000 lumens each, you will end up with about 18 fixtures.
That number is still a starting point. The final placement must also ensure sufficient uniformity, limited shadowing, and good visibility between racking and machinery.
Which factors change the outcome?
Height and distance between the fixtures
The higher a fixture is hung, the larger the illuminated surface can become, but also the faster the light intensity at floor level decreases. Therefore, in high halls, you must look not only at lumens, but also at the beam angle and the distance between fixtures. High power with the wrong light distribution can still result in dark zones.
Racks, machinery and obstacles
In an open hall, light is easier to distribute than in a warehouse with high shelving or a production hall with machinery. Obstacles block light and create shadows. In aisles between racks, a targeted light distribution is often more effective than broad general lighting. Therefore, the layout of the hall is just as important as the total number of lumens.
Reflection, pollution and maintenance
Light walls and ceilings help to utilize light better. Dark surfaces and contamination do the opposite. In a dusty or humid industrial hall, you must take into account light loss over time. Therefore, a good calculation applies not only to today's situation, but also to the performance level you want to achieve in a few years' time.
Which fixture suits your industrial hall?
The calculation of industrial hall lighting is directly linked to the type of fixture. For higher halls, LED high bays are often used, for example LED high bays for 8 m and higher. These are suitable for greater mounting heights and can direct light onto the workspace with the right optics. For mounting heights around 4–6 m, you can choose LED high bays for 4–6 m height. For lower halls or workshops, low bays are often more logical, as they distribute the light more broadly and softly at a limited height.
Industrial LED light lines are particularly interesting in logistics halls, warehouses, and long work zones. They provide a sleek, even distribution and are often efficient in rows or aisle structures. If you are still using outdated fluorescent fixtures, a retrofit sometimes seems like the fastest route.Yet, a completely new fixture or a new light line often delivers a better result in terms of light distribution, efficiency, and lifespan.
The rule of thumb is simple: do not choose the product first and then start calculating, but first determine the lighting objective and then select the fixture that suits it.
Technical specifications you should not skip
Light quality on the work floor
Lux alone does not tell the whole story. In an industrial hall, you also want pleasant and safe lighting. For many work environments, a CRI of 80 or higher is a good starting point so that colors remain sufficiently recognizable. A color temperature of 4000K is often chosen because it looks neutral and work-oriented. If you have a space for control work or visual inspection, also pay attention to color consistency and glare reduction.
Flicker-free light deserves extra attention in areas where people work for long periods, operate machinery, or frequently look upward. Good LED lighting increases comfort and helps reduce errors and fatigue.
Protection and suitability for industrial environments
In industrial lighting for halls, dust, moisture, temperature fluctuations, and impact loads often play a major role. Therefore, not only light output is important, but also the correct IP rating and IK rating. In harsher environments, you often see fixtures rated IP54 or higher and solid impact resistance, depending on the application. This prevents malfunctions and unnecessary replacement.
Efficiency and control
Additionally, pay attention to the efficiency in lumens per watt. A more efficient fixture delivers more usable light with lower energy consumption.If you want to make the installation even smarter, include presence detection, daylight control, or DALI control directly in the plan. Especially in warehouses where not every zone is in continuous use, this can save many unnecessary operating hours.
Calculate savings and payback period
In addition to the lighting calculation, you usually also want to know what the switch to LED will yield. You can use this formula for that:
annual energy savings in kWh = (old total power - new total power) x operating hours per year/1000
Suppose a warehouse currently has 24 old 400W fixtures and you replace them with 24 LED high bays of 200W. Then the total power drops from 9,600W to 4,800W. At 3,000 operating hours per year, you save 14,400 kWh annually. Multiply that by your current electricity price and you have an initial indication of the annual euro savings.
For a complete business case, also factor in maintenance.LED fixtures generally last longer and require less replacement at height. If you add sensors or daylight control, the actual energy consumption often decreases even further. Therefore, look not only at the purchase price, but at the total cost over the entire service life.
When is a professional lighting calculation a smart choice?
You can easily make a basic calculation yourself. A professional lighting calculation is especially wise if you are working with high shelving, multiple work zones, varying ceiling heights, or a combination of warehouse and production areas. Also, when replacing fluorescent tubes or old high bays, a lighting plan is often the fastest way to prevent over- or under-lighting.
LedLoket helps business customers with this through personal technical support, a free lighting calculation, and advice on suitable high bays, low bays, trunking systems, and sensors.Thanks to the wide range and delivery from our own stock, you can not only count on us, but quickly move on to a concrete solution. If you would like to view products first, you are also welcome in our showroom in Denekamp, Overijssel.
Frequently asked questions about calculating lighting for an industrial hall
Can I calculate industrial hall lighting based solely on m²?
For an initial estimate yes, but not for a reliable outcome. You must also take into account height, fixture type, beam angle, obstacles, reflection, and maintenance. Calculating solely with square meters often gives an overly optimistic or too crude picture.
How do I calculate the number of fixtures?
First calculate the total number of lumens needed and then divide that by the number of lumens per fixture.Next, check whether the chosen fixtures can be properly positioned in practice to ensure sufficient uniformity and limited shadowing.
What is better for a hall: high bay, low bay, or continuous light line?
That depends on the height and layout of the space. High bays are usually better suited for higher halls, low bays for lower workspaces, and continuous light lines for long hallway structures or logistics zones. The best choice is the solution that delivers the desired lux most evenly to the right location.
Is LED retrofit in existing fluorescent fixtures always a smart choice?
Not always. Retrofit can be interesting as a quick intermediate solution, but it far from always provides the best light distribution or highest efficiency. Always check the technical suitability, safety, and product specifications. In many halls, a new fixture or a new continuous light line is ultimately the stronger choice.
Does emergency lighting need to be included separately?
Yes. Emergency lighting is a separate discipline and is not simply resolved by general aisle lighting. Escape routes and emergency situations are subject to specific requirements and design rules. If you are also working out that part, make sure to include the relevant standards for emergency lighting, such as NEN-EN 50172, in the plan.
