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How to Convert from Lumen/square foot [lm/ft^2] to Lux [lx]?
Learn how to convert illumination measurements from lumen per square foot to lux with a clear explanation and practical examples using our online unit converter tool.
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Lumen/square foot [lm/ft^2] to Lux [lx] Conversion Table
| Lumen/square foot [lm/ft^2] | Lux [lx] |
|---|
Custom Unit Conversion Table Generator – Instant Printable Conversion Tables
Enter the starting number (positive decimal or integer ≥ 0). Example: 0.1, 1, 5.
Enter the ending number (positive decimal or integer > Start Value). Example: 10, 50, 100.
Enter the step size (positive decimal > 0 and < End Value – Start Value). Example: 1.0, 2.5.
| Lumen/square foot [lm/ft^2] | Lux [lx] |
|---|
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What Is This Tool?
This tool converts measurements of illumination from lumen per square foot (lm/ft²), commonly called foot-candle, to lux (lx), the SI unit of illuminance. It helps users align imperial lighting units with the metric system, facilitating accurate lighting design and compliance.
How to Use This Tool?
- Enter the illumination value in lumen per square foot (lm/ft²).
- Select lumen/square foot as the input unit and lux as the output unit.
- Click convert to see the equivalent illuminance value in lux (lx).
Key Features
- Converts lumen/square foot to lux with a defined conversion rate.
- Supports lighting measurements used in architecture, photography, horticulture, and museum lighting.
- Easy-to-use interface for quick unit conversion.
- Browser-based and accessible for multiple professional applications.
Examples
- Convert 5 lm/ft² to lux: 5 × 10.7639104167 = 53.81955 lx
- Convert 10 lm/ft² to lux: 10 × 10.7639104167 = 107.6391 lx
Common Use Cases
- Specifying and verifying lighting levels in offices, classrooms, and retail areas.
- Measuring and setting illumination in photography, stage, and display lighting.
- Determining grow-light positioning for horticulture and controlling lighting in museums and galleries.
- Calibrating lamps and lux meters for compliance with photometric standards.
Tips & Best Practices
- Ensure consistent use of units when specifying lighting requirements.
- Use this tool to align measurements with international lighting codes and standards.
- Be aware that localized lighting variations may require additional measurement methods.
- Consider environmental factors that can influence illumination accuracy.
Limitations
- Conversion assumes uniform illumination on the measurement surface.
- Accuracy can be affected by the precision of instruments and environmental conditions.
- Does not account for directional or highly variable lighting distributions.
Frequently Asked Questions
- What does lumen per square foot measure?
- Lumen per square foot (lm/ft²) measures illuminance, specifically the luminous flux incident on a one-square-foot surface. It is also known as foot-candle.
- Why convert lumen/square foot to lux?
- Converting to lux aligns the measurement with the SI standard, enabling consistent lighting specifications and adherence to international codes.
- Can this conversion be used for outdoor lighting measurements?
- While lux is commonly used outdoors, this conversion tool is primarily designed for converting indoor illumination measurements from lumen/square foot to lux.
Key Terminology
- Lumen per square foot (lm/ft²)
- A unit of illuminance measuring luminous flux incident on one square foot, equivalent to foot-candle.
- Lux (lx)
- The SI derived unit of illuminance, equal to one lumen per square metre, reflecting luminous flux per area.
- Illuminance
- The measure of luminous flux falling on a surface area, determining how much light is received.