When choosing LED high bay fixtures , everything starts with the mounting height. If a fixture is hung at 5 meters, you need a different light output and beam angle than at 9 or 12 meters. Therefore, do not just look at wattage, but primarily at lumens, lux on the floor, and the light distribution. This prevents dark zones, glare, and unnecessary energy consumption.
Why height determines light output
The higher a high bay is suspended, the larger the illuminated surface becomes and the less light remains per square meter. Therefore, at greater heights, you usually choose more lumen, a more focused beam, or more fixtures. From a mounting height of approximately 4 meters, a high bay is often the logical choice for warehouses, halls, workshops, and stables. At lower heights, a different type of fixture is often more efficient.
Guideline per mounting height
Use this table as a practical starting point.The exact choice also depends on the desired lux level, shelving, machinery, light color, and the reflection of walls and floors. If you want more background information and calculation examples, check out Calculating industrial hall lighting.
| Mounting height | Luminous flux per fixture | Popular wattage | Beam angle | Often suits |
|---|---|---|---|---|
| High bays for 4–6 meters | approx. 12,000-18,000 lumens | often 100W | 90°-120° | workshops, smaller halls, stables |
| 6-8 meters | approx. 18,000-24,000 lumens | often 150W | 90° | warehouses, showrooms, sports halls |
| High bays for 8 meters and higher | approx. 24,000-30.000 lumens | often 150-200W | 60°-90° | warehouses, logistic areas |
| 10 meters and higher | 30,000 lumens or more | often 200W+ | 60° or smaller | high storage and industrial halls |
Pay attention to lumens, lux, and beam angle
Wattage primarily indicates energy consumption. For a high bay light at height, lumens are more important because this represents the actual light output. Next, you look at lux: how much light is needed on the work floor. A storage area usually requires less lux than a workshop or production area. The beam angle then determines whether the light falls downwards broadly or in a more concentrated manner. The higher the installation, the more often a narrower beam works better.
How to calculate the number of high bays from height
The quick basic formula
A good initial calculation is simple: surface area x desired lux level = total lumens required. Then divide that number by the luminous flux of a single high bay. This allows you to quickly make an initial selection based on height, light output, and number of fixtures.
Example at a height of 7 meters
Suppose a 600 m² warehouse requires 200 lux. You will then need approximately 120,000 lumens at floor level. If you choose a 20,000-lumen fixture at a height of 7 meters, you will theoretically end up with 6 units. In practice, this number may be higher due to aisles, shelving, dark walls, or a greater distance between fixtures. Therefore, a lighting plan is often smarter for larger halls than simply calculating based on wattage.
- Look at the height first and only then at the wattage.
- Choose the lux level based on the function of the room.
- Check whether the beam angle suits an open floor or narrow aisles.
- Take obstacles such as racks, machinery, and roof structures into account.
Additional points of attention when choosing
Light color
For general workspaces, 4000K is often a pleasant and practical choice. If you want extra bright and high-contrast light in an industrial environment, 5000K or 6000K is also used.
IP rating
Good protection is important in dusty or damp areas. For many warehouses, sheds, and barns, IP65 is a frequently chosen standard.
Glare
If a high bay hangs relatively low above lines of sight or workstations, a diffuser or appropriate optics helps to limit annoying glare.
Frequently asked questions about high bays and height
From what height should you choose a high bay?
From a mounting height of approximately 4 meters, a high bay is often suitable. Below that height, LED panels, trunking lighting, or surface-mounted fixtures are generally more efficient and comfortable.
Is 100W enough at a height of 6 meters?
That depends, but only if the space does not require a high lux level and the fixture provides sufficient lumen output. Therefore, always look at the luminous flux and not just the wattage.
What is more important: watts or lumens?
Lumens are more important. Two high bays with the same wattage can still have a different light output. Therefore, lumens are the better comparison when choosing for height.
Which beam angle do I need?
At a height of 4 to 6 meters, a wider beam often works well.At greater heights, a narrower beam helps direct the light more strongly downward and limit lateral light loss.
How do I know how many fixtures I really need?
A rough calculation provides a general guideline, but for larger warehouses or industrial halls, a lighting calculation is more accurate. This allows you to immediately see the light distribution, mutual distance, and lux level on the work floor.
Are you in doubt between 100W, 150W, or 200W, or do you want a lighting plan for a warehouse or hall? LedLoket is happy to help you with personal technical advice, and for business projects also with Request a lighting calculation. With a wide range of high bays and fast delivery from our own warehouse, making the switch to efficient high bay lighting is a lot easier.
