1. What is a Light Layout Calculator?

Definition: This calculator determines the number of light fixtures needed to achieve a desired illumination level in a space.

Purpose: It helps architects, interior designers, and lighting professionals plan lighting layouts for optimal illumination.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( FC \) — Required illumination level (foot-candles)
• \( \text{Area} \) — Area to be illuminated (square feet)
• \( \text{Lumens per Light} \) — Light output of each fixture (lumens)

Explanation: The total required lumens (FC × Area) is divided by the output of each light to determine how many fixtures are needed.

3. Importance of Lighting Calculation

Details: Proper lighting calculation ensures adequate illumination for tasks, safety, and comfort while avoiding energy waste from over-lighting.

4. Using the Calculator

Tips: Enter the desired foot-candle level (typically 30-50 for offices, 10-20 for hallways), area in square feet, and lumens per fixture (default 800 lm).

5. Frequently Asked Questions (FAQ)

Q1: What are typical FC values for different spaces?
A: Offices: 30-50 fc, Retail: 50-100 fc, Hallways: 10-20 fc, Kitchens: 30-75 fc.

Q2: How do I find lumens per light?
A: Check the product specifications of your light fixtures (e.g., 800 lm for 60W equivalent LED).

Q3: Does this account for light loss factors?
A: No, consider multiplying the result by 1.2-1.5 to account for fixture aging and dirt accumulation.

Q4: What about different mounting heights?
A: This is a basic calculation. For precise layouts, consider using lighting design software.

Q5: How do I adjust for multiple fixture types?
A: Calculate each type separately or use an average lumens value for mixed fixtures.