Calculator Inputs
Example Data Table
| Warehouse Type | Area | Target Lux | Fixture Lumens | Typical Use |
|---|---|---|---|---|
| Bulk storage | 1,200 sq m | 150 lux | 20,000 lm | Pallet storage and movement |
| Picking aisle | 1,800 sq m | 300 lux | 22,000 lm | Labels, scanning, and packing |
| Inspection zone | 600 sq m | 500 lux | 18,000 lm | Quality checks and sorting |
Formula Used
Area = length × width.
Raw lumens needed = area × target lux.
Adjusted lumens needed = raw lumens needed × safety factor.
Fixture lumens needed = adjusted lumens needed ÷ (coefficient of utilization × light loss factor).
Minimum fixtures = fixture lumens needed ÷ lumens per fixture, rounded up.
Connected load = actual fixtures × fixture watts ÷ 1000.
Monthly energy = connected load × daily hours × monthly operating days.
Monthly cost = monthly energy × energy rate.
How to Use This Calculator
- Enter warehouse length and width in meters.
- Add ceiling height and work plane height.
- Enter the target lux for the warehouse activity.
- Add fixture lumens, fixture watts, utilization factor, and loss factor.
- Set the safety factor and spacing ratio.
- Enter operating hours, energy rate, and fixture cost.
- Press the calculate button.
- Download the result as CSV or PDF.
Warehouse Lighting Design Guide
Why lighting design matters
Warehouse lighting affects safety, speed, and stock accuracy. A good plan gives workers enough light at the task surface. It also limits glare on labels, scanners, forklifts, and packing benches. Poor lighting can create shadows between racks. It can also waste energy through oversized fixtures. This calculator uses practical inputs, so early planning becomes easier. It does not replace a professional photometric layout. It gives a strong starting point for fixture quantity, spacing, and operating cost.
Core planning factors
The main value is target illuminance. It is entered in lux. Storage aisles may need modest levels. Inspection zones, picking lanes, and dispatch tables often need higher levels. Room size then defines the floor area. Fixture lumens describe the light output from one luminaire. Coefficient of utilization estimates how much light reaches the working plane. Light loss factor covers dirt, age, heat, and lens wear. A safety factor adds allowance for future decline or difficult room conditions.
Spacing and mounting checks
Mounting height is measured from the work plane to the fixture. It guides spacing. Many high bay layouts use a spacing to mounting height ratio between 1.0 and 1.5. Lower ratios usually improve uniformity. Wider spacing reduces fixture count, but it can create dark bands. This tool compares row and column spacing with your chosen ratio. The result warns when the layout may need tighter spacing.
Energy and budget review
Lighting design should include power. The calculator estimates connected load, power density, daily energy, monthly energy, and monthly cost. These values help compare fixture models. A higher lumen per watt unit may cost more upfront. It may still save money over long operation hours. Fixture cost is also included for a rough installed material budget. Labor, controls, emergency lighting, and permits are not included.
Using the result wisely
Treat the output as a design estimate. Check rack heights, beam angles, ceiling reflectance, skylights, and local safety rules before purchase. Review glare near forklift routes and high shelf labels. For final work, request a photometric plan from a lighting supplier or engineer. Export the result and keep it with project notes. Update assumptions whenever products, duties, or room layouts change later.
FAQs
1. What is warehouse lighting design?
It is the planning of light levels, fixture count, spacing, and power for storage, picking, packing, loading, or inspection areas.
2. What target lux should I use?
Use lower lux for basic storage. Use higher lux for picking, packing, inspection, labels, and quality work. Always check local guidance.
3. What is coefficient of utilization?
It estimates how much fixture light reaches the working plane. Room shape, mounting height, reflectance, and fixture type affect it.
4. What is light loss factor?
It accounts for output reduction from age, dust, heat, lens dirt, and maintenance conditions. Lower values need more fixture lumens.
5. Why does fixture count round upward?
Lighting layouts need whole fixtures. The calculator rounds up so the design does not fall below the required lumen estimate.
6. What does spacing ratio mean?
It compares fixture spacing with mounting height. A lower ratio usually improves uniformity and reduces dark bands between fixtures.
7. Does this replace a photometric plan?
No. It gives an early estimate. Final projects should review glare, rack shadows, emergency lighting, controls, and supplier photometrics.
8. Can I export the result?
Yes. After calculation, use the CSV or PDF button above the form to save the lighting design summary.