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How to Convert from Phot [ph] to Lumen/square centimeter?
Learn how to convert illuminance values from the older phot unit to lumen per square centimeter, a precise photometric measure widely used in lighting and display technology.
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Phot [ph] to Lumen/square centimeter Conversion Table
| Phot [ph] | Lumen/square centimeter |
|---|
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] | Lumen/square centimeter |
|---|
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What Is This Tool?
This converter transforms illuminance measurements from phot (ph), a traditional non-SI unit, into lumen per square centimeter, a modern unit used for quantifying luminous flux on small surfaces.
How to Use This Tool?
- Enter the illuminance value in phot units.
- Select 'phot [ph]' as the input measurement.
- Choose 'lumen/square centimeter' as the output unit.
- Click convert to see the equivalent lumen/square centimeter value.
Key Features
- Converts illuminance specifically between phot and lumen/square centimeter units.
- Based on a direct one-to-one conversion rate.
- Useful for applications in lighting engineering, photometry, and display calibration.
- Browser-based and easy to use for quick conversions.
Examples
- 5 Phot [ph] equals 5 Lumen/square centimeter.
- 0.1 Phot [ph] equals 0.1 Lumen/square centimeter.
Common Use Cases
- Describing very bright illumination such as direct sunlight.
- Specifying output intensity of small high-power LEDs or LED dies.
- Measuring illuminance on microscope slides or sensor surfaces in laboratories.
- Calibrating brightness of small displays or optical components.
Tips & Best Practices
- Use this tool when converting from legacy phot units to modern photometric measurements.
- Rely on lumen/square centimeter units for accurate brightness evaluation in small-area applications.
- Verify unit selections before conversion to ensure accuracy.
- Be aware this tool is ideal for high levels of illumination measurements.
Limitations
- The phot is a non-SI legacy unit which may cause confusion internationally.
- High-precision instruments are needed to measure illuminance accurately on very small areas.
- This conversion assumes direct equivalence but real-world measurement conditions may vary.
Frequently Asked Questions
- What is the phot unit used for?
- The phot is a legacy unit of illuminance historically used to describe very bright lighting conditions, such as direct sunlight or strong indoor studio lighting.
- Is the phot unit still commonly used?
- Phot is a non-SI unit and less common today, mostly appearing in older technical documents and specific historical contexts.
- How do lumen/square centimeter units help in measurements?
- Lumen/square centimeter quantifies luminous flux per unit area, making it useful for precise brightness measurements on small surfaces like LEDs or microscope slides.
Key Terminology
- Phot [ph]
- An older, non-SI illuminance unit equal to one lumen per square centimeter, used to express very high levels of illumination.
- Lumen/square centimeter
- A measure of illuminance indicating the luminous flux in lumens received per one square centimeter of surface area.
- Illuminance
- The total luminous flux incident on a surface per unit area, indicating how much light illuminates that surface.