1. What is Recessed Lighting Calculation?

The recessed lighting calculation determines how many light fixtures are needed to properly illuminate a space based on room size, desired light level (lux), and the brightness of each light (lumens).

2. How Does the Calculator Work?

The calculator uses the recessed lighting formula:

Where:

• Room area — Floor area in square meters (m²)
• Lux — Desired illumination level in lux
• Lamp lumens — Light output of each fixture in lumens

Explanation: The formula calculates the total lumens needed for the space (area × lux) and divides by the lumens per fixture to determine how many lights are required.

3. Importance of Proper Lighting Calculation

Details: Correct lighting calculation ensures adequate illumination for the space's purpose while avoiding energy waste from over-lighting or insufficient lighting that causes eye strain.

4. Using the Calculator

Tips: Measure room dimensions accurately. Typical lux values: 100-150 for living rooms, 200-300 for kitchens, 500 for task lighting. LED recessed lights typically provide 500-1000 lumens each.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between lux and lumens?
A: Lumens measure total light output from a source, while lux measures light intensity at a surface (1 lux = 1 lumen/m²).

Q2: How do I convert square feet to square meters?
A: Multiply square feet by 0.0929 to get square meters.

Q3: What are typical lux values for different rooms?
A: Living rooms: 100-150 lux, Kitchens: 200-300 lux, Offices: 300-500 lux, Bathrooms: 300-500 lux.

Q4: Should I round up the number of lights?
A: Yes, always round up to ensure adequate lighting. Consider spacing requirements for even distribution.

Q5: Does ceiling height affect the calculation?