No Results
No results found for your search. Please try another term.
How to Convert from Phot [ph] to Lumen/square foot [lm/ft^2]?
Learn how to convert illumination values from phot (ph), an older unit, to lumen per square foot (lm/ft²), commonly used in lighting design and various practical applications.
Please check your input. It must be a valid numeric value.
Phot [ph] to Lumen/square foot [lm/ft^2] Conversion Table
| Phot [ph] | Lumen/square foot [lm/ft^2] |
|---|
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 foot [lm/ft^2] |
|---|
Explore More Illumination Units Converter
- How to convert from lux [lx] to phot [ph]?
- How to convert from phot [ph] to lux [lx]?
- How to convert from meter-candle [m*c] to phot [ph]?
- How to convert from phot [ph] to meter-candle [m*c]?
- How to convert from centimeter-candle [cm*c] to phot [ph]?
- How to convert from phot [ph] to centimeter-candle [cm*c]?
- How to convert from foot-candle [ft*c, fc] to phot [ph]?
- How to convert from phot [ph] to foot-candle [ft*c, fc]?
- How to convert from flame to phot [ph]?
- How to convert from phot [ph] to flame?
- How to convert from nox to phot [ph]?
- How to convert from phot [ph] to nox?
- How to convert from candela steradian/sq. meter to phot [ph]?
- How to convert from phot [ph] to candela steradian/sq. meter?
- How to convert from lumen/square meter [lm/m^2] to phot [ph]?
- How to convert from phot [ph] to lumen/square meter [lm/m^2]?
- How to convert from lumen/square centimeter to phot [ph]?
- How to convert from phot [ph] to lumen/square centimeter?
- How to convert from lumen/square foot [lm/ft^2] to phot [ph]?
- How to convert from phot [ph] to lumen/square foot [lm/ft^2]?
- How to convert from watt/sq. cm (at 555 nm) to phot [ph]?
- How to convert from phot [ph] to watt/sq. cm (at 555 nm)?
What Is This Tool?
This conversion tool helps translate illumination levels measured in phot (ph), a historical unit representing very bright light, into lumen per square foot (lm/ft²), a widely used unit equivalent to foot-candles in modern lighting practice.
How to Use This Tool?
- Enter the value in phot (ph) that you want to convert.
- Select phot [ph] as the input unit and lumen/square foot [lm/ft²] as the output unit.
- Click convert to see the equivalent illumination value in lumen per square foot.
Key Features
- Converts phot (ph) units to lumen per square foot (lm/ft²) for accurate illumination translation.
- Supports understanding of older and high-intensity lighting data in contemporary units.
- Browser-based and easy to use for lighting engineers, designers, and photographers.
Examples
- 1 phot (ph) converts to approximately 929.03 lumen/square foot (lm/ft²).
- 0.5 phot (ph) converts to about 464.52 lumen/square foot (lm/ft²).
Common Use Cases
- Translating high illuminance values from historical or technical lighting documents into modern units.
- Verifying indoor illumination levels in architectural, retail, or office lighting design.
- Setting proper light levels in photography, stage lighting, horticulture, and museum displays.
Tips & Best Practices
- Be aware that phot is an older, non-SI unit mainly used for very bright illumination levels.
- Use the tool to ensure compatibility between historical data and current lighting standards.
- Confirm unit selections carefully to avoid confusion between luminance and illuminance measures.
Limitations
- Phot is a non-standard and outdated measurement unit which may not be practical for everyday lighting.
- Numerical scale in phot is large, requiring care when interpreting or converting values.
- The tool relies on established conversion rates without detailing precision or rounding guidelines.
Frequently Asked Questions
- What is a phot?
- Phot (ph) is an older unit of illuminance that equals one lumen per square centimetre or 10,000 lux, used historically for high brightness measures.
- What does lumen per square foot measure?
- Lumen per square foot (lm/ft²) measures illuminance, representing the luminous flux hitting a surface of one square foot, commonly called foot-candle.
- Why convert from phot to lumen/square foot?
- Conversion is needed to interpret older lighting data or very high illuminance levels in terms familiar for modern lighting design and code compliance.
Key Terminology
- Phot [ph]
- An old illuminance unit equal to one lumen per square centimetre, used to describe very bright lighting levels.
- Lumen per square foot [lm/ft²]
- A unit of illuminance indicating luminous flux per square foot, equivalent to foot-candle and common in lighting practice.
- Illuminance
- The amount of luminous flux incident on a surface area, measured in units such as phot or lumen per square foot.