1. What is a Lumens to Lux Calculator?

Definition: This calculator converts luminous flux (lumens) to illuminance (lux) by considering the surface area being illuminated.

Purpose: It helps lighting designers, architects, and homeowners determine the light intensity on a surface based on the light source's output.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• Lux — Illuminance (lumens per square meter)
• Lumens — Total luminous flux emitted by the light source
• Area — Surface area being illuminated (square meters)

Explanation: Lux measures how much luminous flux is spread over a given area. One lux equals one lumen per square meter.

3. Importance of Lux Calculation

Details: Proper illuminance calculation ensures adequate lighting for different spaces (e.g., 500 lux for office work, 100 lux for hallways).

4. Using the Calculator

Tips: Enter the total lumens from your light source and the area to be illuminated in square meters. Both values must be > 0.

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 on a surface (lumens per square meter).

Q2: How many lux is typical sunlight?
A: Direct sunlight is about 100,000 lux, while an overcast day might be 1,000 lux.

Q3: What's a good lux level for reading?
A: Reading typically requires 300-500 lux for comfort.

Q4: Does distance affect lux?
A: Yes, lux decreases with distance from the light source (inverse square law).

Q5: How do I find lumens for my light bulb?
A: Check the packaging or manufacturer specifications - modern LED bulbs often list lumens.