Downlight Spacing Formula:
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Definition: This calculator determines the optimal spacing between LED downlights based on room area and number of fixtures.
Purpose: It helps achieve uniform lighting distribution in residential and commercial spaces.
The calculator uses the formula:
Where:
Explanation: The formula calculates the square root of the area per light to ensure even distribution.
Details: Correct spacing prevents dark spots, reduces glare, and creates balanced illumination while optimizing energy efficiency.
Tips: Enter the room area in square feet and the total number of downlights. All values must be > 0.
Q1: Should I measure in feet or meters?
A: Use consistent units (all feet or all meters). The calculator defaults to feet.
Q2: What's the ideal number of downlights for a room?
A: As a rule of thumb, one downlight per 4-6 sq ft for general lighting, but this varies by lumen output.
Q3: How does ceiling height affect spacing?
A: Higher ceilings may require closer spacing or higher lumen fixtures to maintain light levels at floor level.
Q4: Should I adjust spacing near walls?
A: Yes, typically place the first row of lights 3-4 feet from walls to avoid creating shadows.
Q5: Can I use this for other light types?
A: This works best for downlights. Track lighting or pendants may require different calculations.