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How to Convert from Phot [ph] to Foot-candle [ft*c, fc]
Learn how to convert illumination values from the phot unit to foot-candle. Understand their definitions, use cases, and applications in lighting engineering, photography, and architectural design.
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Phot [ph] to Foot-candle [ft*c, fc] Conversion Table
| Phot [ph] | Foot-candle [ft*c, fc] |
|---|
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.
| Phot [ph] | Foot-candle [ft*c, fc] |
|---|
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What Is This Tool?
This converter allows you to change illuminance measurements from phot, an older unit denoting high levels of light, into foot-candles, a unit widely used in North American lighting practices.
How to Use This Tool?
- Enter the illuminance value in phot (ph) units
- Choose phot as the source unit and foot-candle as the target unit
- Click the convert button to see the equivalent foot-candle value
- Use the conversion results for lighting design or exposure calculations
Key Features
- Converts illumination values from phot (ph) to foot-candle (ft*c, fc)
- Supports conversion relevant to lighting engineering and photography
- Provides examples for easy understanding
- Browser-based and straightforward to use
Examples
- 2 ph converts to approximately 1858.06 foot-candles
- 0.5 ph converts to approximately 464.52 foot-candles
Common Use Cases
- Translating older high illuminance readings into units used in North America
- Setting lighting levels in offices and retail spaces
- Adjusting exposure settings in photography, film, and stage lighting
- Ensuring compliance with building codes related to light levels
Tips & Best Practices
- Confirm the context of your illuminance measurements before converting
- Be aware that phot is an obsolete unit and less common in modern documents
- Use the converted foot-candle value to align with regional lighting standards
- Consider environmental and measurement accuracy factors when applying results
Limitations
- Phot is an outdated non-SI unit rarely used nowadays
- Foot-candle is regionally common mainly in North America; lux usage is international
- Conversions might require intermediate units for full clarity between systems
- Measurement accuracy and environmental variables can affect practical precision
Frequently Asked Questions
- What does one phot represent in terms of illumination?
- One phot is an older unit of illuminance equal to one lumen per square centimetre, which equals 10,000 lux and indicates very bright lighting levels.
- Where is the foot-candle commonly used?
- Foot-candle is mainly used in North American lighting practices for specifying task and ambient light levels, including offices, retail, and building regulations.
- Why convert from phot to foot-candle units?
- Converting from phot to foot-candle helps translate high or historical illuminance values into units familiar in North American contexts like lighting design and photography.
Key Terminology
- Phot [ph]
- An obsolete, non-SI unit of illuminance equal to one lumen per square centimetre or 10,000 lux, historically used for very bright lighting levels.
- Foot-candle [ft*c, fc]
- A non-SI unit of illuminance equal to one lumen per square foot, commonly employed in North American lighting practice.
- Illuminance
- The measure of luminous flux incident on a surface, which quantifies brightness perceived on that surface.