1. What is a Lux to Lumens Calculator?

Definition: This calculator converts illuminance (lux) to luminous flux (lumens) by multiplying by the area in square meters.

Purpose: It helps lighting designers, architects, and engineers determine the total light output needed for a space based on desired illumination levels.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• Lumens (lm) — Total quantity of visible light emitted by a source
• Lux (lx) — Illuminance or light intensity per unit area (1 lux = 1 lumen/m²)
• Area (m²) — Surface area being illuminated

Explanation: Lux measures how much light falls on a surface, while lumens measure the total light output. The formula converts between these units using the area.

3. Importance of Lux to Lumens Conversion

Details: Proper conversion ensures adequate lighting design, energy efficiency, and compliance with lighting standards for different spaces.

4. Using the Calculator

Tips: Enter the desired lux level (illuminance) and the area in square meters. Both values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between lux and lumens?
A: Lumens measure total light output, while lux measures how much of that light reaches a surface (lumens per square meter).

Q2: What are typical lux requirements?
A: Offices need ~500 lux, warehouses ~200 lux, precision work ~1000 lux. Standards vary by application.

Q3: How does distance affect lux?
A: Lux decreases with distance from the light source (inverse square law), while lumens remain constant.

Q4: Can I use this for outdoor lighting?
A: Yes, but outdoor areas often require higher lux levels due to larger spaces and ambient light competition.

Q5: How do I account for light loss factors?
A: Multiply the result by 1.2-1.5 to account for fixture efficiency, dirt accumulation, and other losses.