1. What is an LED Downlights Calculator?

Definition: This calculator determines the number of LED downlights needed to properly illuminate a room based on desired light level, room size, and light output.

Purpose: Helps homeowners, interior designers, and electricians plan lighting layouts for optimal illumination.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

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

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

3. Importance of Proper Lighting Calculation

Details: Correct lighting ensures adequate visibility, creates desired ambiance, and prevents energy waste from over-lighting.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

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

Q2: How do I find my room's area?
A: Multiply length by width (in feet). For irregular rooms, divide into rectangles.

Q3: What's the average lumens for LED downlights?
A: Typically 600-1200 lumens. Check your fixture specifications.

Q4: 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.

Q5: Does this account for light color (Kelvin)?
A: No, this only calculates quantity. Choose color temperature (2700K-4000K) based on room purpose.