1. What is Lumens Per Square Meter?

Lumens measure the total amount of visible light emitted by a source, while lux measures illuminance (lumens per square meter). This calculator converts between these two important photometric units.

2. How Does the Calculator Work?

The calculator uses the simple formula:

Where:

• \( lux \) — Illuminance in lumens per square meter (lx)
• \( area \) — Surface area in square meters (m²)

Explanation: To find the total luminous flux (lumens), multiply the illuminance (lux) by the area being illuminated.

3. Importance of Luminous Flux Calculation

Details: Calculating lumens from lux is essential for lighting design, ensuring proper illumination levels for different spaces and applications.

4. Using the Calculator

Tips: Enter illuminance in lux and area in square meters. Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between lumens and lux?
A: Lumens measure total light output, while lux measures light intensity per unit area (1 lux = 1 lumen/m²).

Q2: How many lux is typical office lighting?
A: Office spaces typically require 300-500 lux, while detailed work areas may need 750-1000 lux.

Q3: What's a good lux level for reading?
A: Reading areas should have at least 500 lux, with 800-1000 lux recommended for comfortable reading.

Q4: How do I measure lux?
A: Lux can be measured with a light meter, or many smartphone apps can provide approximate readings.

Q5: How does distance affect lux?
A: Lux decreases with the square of the distance from the light source (inverse square law).