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How to Convert from Foot-candle [ft*c, fc] to Phot [ph]
Learn how to easily convert illumination measurements from foot-candle units to phot units using this practical online converter tool designed for various lighting applications.
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Foot-candle [ft*c, fc] to Phot [ph] Conversion Table
| Foot-candle [ft*c, fc] | Phot [ph] |
|---|
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.
| Foot-candle [ft*c, fc] | Phot [ph] |
|---|
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What Is This Tool?
This tool allows users to convert illuminance values from foot-candles, a common North American lighting unit, to phots, an older unit used to express very bright illumination levels. It facilitates compatibility between different lighting measurement standards.
How to Use This Tool?
- Enter the value in foot-candles you wish to convert.
- Select foot-candle as the input unit and phot as the output unit.
- Click the convert button to obtain the equivalent illuminance in phots.
- Review and apply the converted value for your lighting calculations or documentation.
Key Features
- Converts illuminance values from foot-candle to phot with a simple input.
- Supports measurement units commonly used in lighting, photography, and horticulture.
- Browser-based and user-friendly interface for quick conversions.
- Provides direct conversion based on established unit relationships.
- Useful for translating lighting levels from legacy documentation to modern contexts.
Examples
- Converting 10 foot-candles results in approximately 0.01076391 phot.
- Converting 500 foot-candles results in about 0.5381955 phot.
Common Use Cases
- Specifying task and ambient lighting levels in offices and retail spaces.
- Setting exposure levels in photography, film, and stage lighting.
- Interpreting older lighting standards and photometric tables that use the phot unit.
- Bridging lighting conventions between North American foot-candle measures and older international photometric data.
- Managing recommended light levels in museums, galleries, and horticultural environments.
Tips & Best Practices
- Use the tool to convert values when working with legacy lighting documentation involving phots.
- Confirm the lighting context, as phot is typically suitable for very bright illuminance scenarios.
- Remember that foot-candle measures flux per square foot, while phot measures per square centimetre.
- Apply conversions carefully when comparing indoor lighting levels to high illumination references.
- Use the converted values for consistency in cross-regional and historical lighting projects.
Limitations
- The phot unit is largely outdated and not widely used in modern lighting measurement.
- Conversion accuracy is dependent on recognizing that 1 phot equals 10,000 lux, representing very high brightness.
- Phot units are mainly applicable to historical data or specialized lighting fields.
- Typical indoor lighting levels in foot-candles may not align directly with phot magnitudes.
Frequently Asked Questions
- What does one foot-candle represent?
- One foot-candle measures luminous flux incident on a surface, equal to one lumen per square foot, commonly used in North American lighting.
- Why use the phot unit if it is outdated?
- The phot unit is useful for understanding very high illumination levels in historical lighting data and older technical standards.
- How is foot-candle related to lux?
- One foot-candle is approximately equal to 10.7639 lux, linking North American and SI illumination units.
Key Terminology
- Foot-candle [ft*c, fc]
- A non-SI unit of illuminance equal to one lumen per square foot, used mainly in North American lighting.
- Phot [ph]
- An older, non-SI unit of illuminance equal to one lumen per square centimetre or 10,000 lux, used historically in photometry and lighting engineering.
- Illuminance
- A measure of luminous flux incident on a surface per unit area.