The right high bay lighting height depends on the fixture’s light output, optical distribution, required illumination and the layout of your space. There is no single mounting height or spacing rule that works for every warehouse, factory or commercial building. Start with the available mounting height, then use the selected fixture’s photometric data to assess light levels, uniformity and glare.
Choosing suitable LED high bay lights means considering how light reaches the working area, rather than selecting a fixture by wattage or ceiling height alone.
Mounting height describes the position of the luminaire within the building. For lighting calculations, it is important to distinguish between two measurements:
For example, if a fixture is mounted 8 metres above the floor and the working surface is 0.8 metres above the floor, its height above that working plane is 7.2 metres.
This is a measurement example, not a recommended installation height. The appropriate arrangement depends on the project’s lighting requirements.
Suspended fixtures may also sit below the ceiling, so ceiling height and mounting height are not always the same.
Mounting height affects the area covered by each fixture and the amount of light reaching the target surface.
A fixture installed higher may cover a broader area, but sufficient illumination still depends on its light output and distribution. A fixture installed lower may create concentrated bright areas or increase glare if its optics and placement are unsuitable.
A well-planned layout should balance:
In warehouses, racks and stored goods can block light. In factories, machinery and overhead structures can create shadows. These obstacles should be included in the lighting assessment.
There is no universal minimum height for every high bay fixture. Check the manufacturer’s installation guidance and assess whether the selected luminaire can provide suitable illumination and glare control at the proposed height.
A powerful fixture with a concentrated beam may be unsuitable for a lower mounting position. Another fixture with different optics and output may perform appropriately in the same space.
If the ceiling is relatively low, compare high bay fixtures with low bay or linear lighting options before making a selection.
High bay lighting is generally intended for taller spaces, while low bay lighting serves lower mounting positions. However, the distinction should not be treated as a fixed height boundary for every product.
Compare the actual fixtures using their light output, optical distribution, glare characteristics and recommended applications. Explore industrial lighting solutions to identify suitable options for your building.
Record the ceiling height and the proposed fixture position. Account for suspension lengths, beams, ducts, cranes and other overhead equipment.
Also identify the surfaces that require illumination. A warehouse floor, inspection bench and vertical storage rack may have different lighting needs.
Set the lighting requirements according to the activities performed in each area and the applicable project requirements.
Storage, circulation, assembly and detailed inspection should not automatically receive the same lighting design. Some workstations may also benefit from dedicated task lighting.
Lumens describe the light output of a fixture; lux describes the illumination reaching a surface. Wattage describes power consumption and cannot, by itself, determine mounting height or fixture spacing.
Optical distribution affects where the light travels. A narrower beam concentrates light within a smaller area, while a wider beam spreads it over a larger area. The appropriate choice depends on the mounting position and site layout.
The Alrouf Highbay Light offers stated outputs from 14,000 to 36,000 lumens and lens options of 60°, 90° and 120°. These options should be evaluated against the project’s required illumination rather than assigned to fixed heights.
Use the selected model’s IES photometric file to calculate the proposed lighting arrangement.
The assessment should consider:
Confirm the exact fixture and lens option before completing the calculations.
The distance between high bay lights depends on mounting height, optical distribution and the required lighting performance. A fixed spacing rule based only on wattage can produce dark areas, excessive overlap or uneven illumination.
Where a manufacturer provides spacing criteria, these can help develop an initial layout. The arrangement should then be checked using photometric calculations.
Warehouse aisles may require a different layout from open production floors. Fixtures positioned without considering racks can illuminate the tops of stored goods while leaving working areas below poorly lit.
Avoid assuming that fixture spacing must always equal mounting height. Evaluate the selected fixture’s distribution and the actual site conditions.
Installation should follow the selected product’s instructions and be completed by qualified personnel using suitable mounting arrangements.
Use the available mounting position as a starting point, then assess the selected fixture’s output, optics and photometric performance. The appropriate height depends on the application and required illumination.
Yes. Some fixtures may create excessive brightness or glare at a lower position. Check whether the model and optical distribution are suitable, or consider an alternative fixture.
No. Evaluate lumen output and light distribution alongside mounting height. Fixtures with the same wattage can have different lighting performance.
Develop a layout using the fixture’s photometric data and any manufacturer spacing guidance. Check illumination and uniformity across the relevant surfaces, including areas affected by obstructions.
It may, but storage aisles, loading areas and workstations can have different requirements. Assess each zone before applying a single arrangement throughout the building.
Selecting mounting height, fixture output and spacing together helps create a lighting arrangement suited to your facility.
For a warehouse or factory project in Saudi Arabia, request a project quotation from Alrouf. Share your building dimensions, proposed mounting height, application, rack or machinery layout, and required illumination levels if available.
