1. What is a Recessed Lighting Calculator?

Definition: This calculator estimates the number of recessed lights needed based on desired illumination level, room area, and light output.

Purpose: It helps homeowners and designers determine how many recessed lights are required for proper room illumination.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( FC \) — Foot-candles (desired illumination level)
• \( \text{Area} \) — Room area in square feet
• \( \text{Lumens per Light} \) — Light output of each fixture

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

3. Importance of Proper Lighting Calculation

Details: Correct lighting ensures adequate illumination for tasks, creates desired ambiance, and avoids over-lighting which wastes energy.

4. Using the Calculator

Tips: Enter desired foot-candles (default 30 for general lighting), room area in square feet, and lumens per light (default 800 for standard LED recessed lights).

5. Frequently Asked Questions (FAQ)

Q1: What are typical FC values for different rooms?
A: Living rooms: 10-20 fc, Kitchens: 30-40 fc, Bathrooms: 70-80 fc, Offices: 30-50 fc.

Q2: How do I find lumens per light?
A: Check the product specifications of your recessed lights (typically 600-1200 lumens for residential LED lights).

Q3: Why does the calculator round up?
A: Lights can't be installed in fractions, so we always round up to ensure adequate illumination.

Q4: Should I adjust for light color or beam angle?
A: This calculator provides a basic estimate. For precise layouts, consider consulting a lighting designer.

Q5: How do I account for room features?
A: Dark walls/ceilings may need 10-20% more lights, while light-colored rooms may need fewer.