Lighting Formula:
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Definition: This calculator estimates the number of light fixtures needed to achieve proper illumination in a warehouse space.
Purpose: It helps facility managers, engineers, and designers determine optimal lighting for safety, productivity, and energy efficiency.
The calculator uses the formula:
Where:
Explanation: The total required lumens (FC × Area) is divided by the output of each light fixture to determine how many fixtures are needed.
Details: Adequate lighting improves safety, reduces errors, enhances productivity, and can significantly impact energy costs.
Tips: Enter the desired foot-candle level (default 25 fc), warehouse area in square feet, and lumens per light fixture (default 10,000 lm). All values must be > 0.
Q1: What's a typical FC requirement for warehouses?
A: Most warehouses require 20-30 foot-candles, with higher values (50-75 fc) for detailed work areas.
Q2: How do I find lumens per light fixture?
A: Check the manufacturer's specifications. LED high bays typically range from 10,000 to 40,000 lumens.
Q3: Does this account for light loss factors?
A: No, consider multiplying the result by 1.2-1.5 to account for dirt depreciation and light loss over time.
Q4: How do I calculate for different light mounting heights?
A: Higher mounting may require more fixtures. Consult an IES lighting handbook for precise calculations.
Q5: Should I round up the result?
A: Yes, the calculator automatically rounds up since you can't install a fraction of a light fixture.