Number of Lights Formula:
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Definition: This calculator determines the number of high bay lights needed to achieve proper illumination in industrial or commercial spaces.
Purpose: It helps facility managers, electricians, and lighting designers plan efficient lighting layouts for warehouses, factories, and large spaces.
The calculator uses the formula:
Where:
Explanation: The total lumens required (FC × Area) is divided by the output of each light to determine how many fixtures are needed.
Details: Correct lighting ensures worker safety, productivity, and energy efficiency while meeting industry standards.
Tips: Enter the required FC (20-50 for most industrial spaces), area size in square feet, and lumens per light (typically 15,000-30,000 for high bays).
Q1: What's a typical FC value for warehouses?
A: Most warehouses require 20-30 foot-candles, while detailed work areas may need 50+ fc.
Q2: How do I find my lumens per light?
A: Check the manufacturer's specifications for your high bay fixtures (typically 15,000-30,000 lumens).
Q3: Why does the result round up?
A: You can't install a fraction of a light fixture, so we always round up to ensure adequate lighting.
Q4: Does this account for light loss factors?
A: No, consider multiplying the result by 1.1-1.2 to account for lumen depreciation over time.
Q5: How does mounting height affect this calculation?
A: Higher mounting requires more lumens to achieve the same FC at floor level. Consider a lighting design software for complex layouts.