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How to Convert from Phot [ph] to Lux [lx]?
Learn how to convert illuminance values from phot (ph) to lux (lx), understanding both units and their practical applications in lighting and photometry.
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Phot [ph] to Lux [lx] Conversion Table
| Phot [ph] | 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.
| Phot [ph] | Lux [lx] |
|---|
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What Is This Tool?
This converter helps transform illuminance measurements from the phot unit to the widely used lux unit. It is designed for users who need to convert older or legacy lighting values into modern SI-compliant units.
How to Use This Tool?
- Enter the illuminance value in phot you want to convert.
- Select phot as the source unit and lux as the target unit.
- Execute the conversion to get the equivalent lux value.
Key Features
- Converts phot (ph) to lux (lx) based on the established conversion rate.
- Supports understanding and working with both older and modern illuminance units.
- Enables compatibility with contemporary lighting design and measurement standards.
Examples
- 2 ph converts to 20,000 lx (2 × 10,000 lx).
- 0.5 ph converts to 5,000 lx (0.5 × 10,000 lx).
Common Use Cases
- Interpreting historical lighting data given in phot units.
- Updating legacy indoor or studio lighting measurements to lux.
- Standardizing illuminance values for architectural and environmental lighting assessments.
Tips & Best Practices
- Ensure clarity on the large conversion factor to avoid misreading small values.
- Use the lux unit for modern lighting design and measurement compliance.
- Refer to this conversion when working with historical or photographic exposure data.
Limitations
- Phot is a non-SI unit largely replaced by lux in modern usage.
- Conversion is mostly relevant for legacy or historical data contexts.
- Large value scale of phot requires careful interpretation during conversion.
Frequently Asked Questions
- What is the relation between phot and lux?
- One phot equals 10,000 lux, representing a large illuminance value.
- Why convert phot to lux?
- Converting phot to lux allows updating older illuminance data to current SI units used in lighting design and standards.
- Is phot still commonly used in lighting measurements?
- No, phot is largely replaced by lux but remains relevant for interpreting historical and legacy lighting information.
Key Terminology
- Phot [ph]
- A non-SI illuminance unit equal to one lumen per square centimetre, representing a high level of brightness.
- Lux [lx]
- The SI derived unit of illuminance, defined as one lumen per square metre, reflecting the human visual response to light.
- Illuminance
- A measurement of luminous flux incident on a surface area, indicating the brightness perceived.