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How to Convert from Phot [ph] to Meter-candle [m*c]
Learn how to convert illuminance values from phot (ph) to meter-candle (m*c), an older unit equal to the lux, with practical examples and usage contexts.
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Phot [ph] to Meter-candle [m*c] Conversion Table
| Phot [ph] | Meter-candle [m*c] |
|---|
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] | Meter-candle [m*c] |
|---|
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What Is This Tool?
This converter allows users to transform illuminance measurements expressed in phot, a historical unit representing high brightness levels, into meter-candle, an older unit equivalent to the modern lux. It helps interpret or compare bright lighting conditions using more familiar units.
How to Use This Tool?
- Enter the illuminance value in phot (ph) you want to convert
- Select phot as the from unit and meter-candle as the to unit
- Click convert to get the equivalent value in meter-candle (m*c)
- Use the result to interpret or apply lighting measurements in your context
Key Features
- Converts illuminance from phot (ph) to meter-candle (m*c)
- Based on a fixed conversion rate where 1 ph equals 10,000 m*c
- Supports understanding of historical and high-level lighting measurements
- Browser-based and easy to use for lighting engineers and photographers
Examples
- 2 ph equals 2 × 10,000 m*c, which is 20,000 m*c
- 0.5 ph equals 0.5 × 10,000 m*c, which is 5,000 m*c
Common Use Cases
- Interpreting very bright illumination, such as direct sunlight, in terms of meter-candle
- Converting historical lighting and photographic exposure data that used phot units
- Calibrating and comparing lighting levels in photography, display testing, and lighting design
- Understanding room or studio lighting intensities from older documentation
Tips & Best Practices
- Always confirm the correct unit symbols (ph for phot, m*c for meter-candle) when entering values
- Use the conversion to facilitate comparison with standard SI-based measurements like lux
- Consider the legacy status of phot and the equivalence of meter-candle to lux for contextual clarity
- Refer to historical standards or technical literature when dealing with older illuminance data
Limitations
- Phot is a non-SI legacy unit and may require careful contextual interpretation
- Meter-candle and lux are numerically the same, but their usage depends on historical or regional preferences
- High illumination values in phot need precise calibration when converted to meter-candle for accuracy
Frequently Asked Questions
- What does one phot represent?
- One phot is an older unit of illuminance equal to one lumen per square centimetre or 10,000 lux, used to express very high illumination levels.
- Is meter-candle different from lux?
- Meter-candle is an older unit equal to one lumen per square meter and is numerically equivalent to the lux.
- Why convert from phot to meter-candle?
- Converting from phot to meter-candle helps interpret very bright illumination values using a more widely recognized and comparable unit like lux.
Key Terminology
- Phot [ph]
- A legacy unit of illuminance equal to one lumen per square centimetre or 10,000 lux, used for high levels of brightness.
- Meter-candle [m*c]
- An older unit of illuminance equal to one lumen per square metre, numerically equal to the lux.
- Lux
- The SI unit of illuminance, representing one lumen per square metre.