1. What is a Recessed Light Calculator?

Definition: This calculator estimates the number of recessed lights needed based on desired illumination level (foot-candles), room area, and light output (lumens).

Purpose: It helps homeowners and lighting designers determine the optimal number of recessed lights for proper room illumination.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

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

Explanation: The total required lumens (FC × Area) is divided by the lumens per light to get the number of fixtures needed.

3. Importance of Proper Lighting Calculation

Details: Correct lighting ensures adequate illumination for tasks, creates desired ambiance, and optimizes energy efficiency.

4. Using the Calculator

Tips: Enter the desired foot-candles (10-20 for living rooms, 30-50 for kitchens), room area in square feet, and lumens per light (default 800). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What are typical FC values for different rooms?
A: Living rooms: 10-20 fc, Kitchens: 30-50 fc, Bathrooms: 50-75 fc, Offices: 30-50 fc.

Q2: How do I find lumens per light?
A: Check the bulb packaging - standard LED recessed lights range from 600-1200 lumens.

Q3: Should I round up the result?
A: Yes, always round up to the nearest whole number for adequate lighting.

Q4: Does this account for light loss factors?
A: No, consider multiplying the result by 1.2 to account for light loss due to ceiling height and reflectivity.

Q5: How do I space the lights?
A: Divide ceiling length by number of lights (rows × columns) for even spacing.