Lumen per Square Meter to Phot Conversion
Convert between Lumen per Square Meter and Phot quickly and accurately.
How to Convert Lumen per Square Meter to Phot
Conversion Formula
Example
Convert 15 lm/m² to ph:
Unit Information
Learn about the illumination units you're converting between
Lumen per Square Meter
lm/m²
Definition
The Lumen per Square Meter is a unit of illuminance that is numerically equivalent to the lux. It represents the luminous flux per unit area, emphasizing the flux aspect of light measurement and providing a direct relationship between light output and surface illumination.
History/Origin
Derived from the fundamental definition of the lux as one lumen per square meter. It provides an alternative way to express illuminance that emphasizes the luminous flux component, making it useful in calculations involving light sources and their output.
Current Use
Widely used in lighting calculations and photometric applications where the relationship between luminous flux and surface area is important. It provides a practical way to understand illuminance in terms of light source output and surface coverage.
Multiplier
1
Offset
0
Phot
ph
Definition
The Phot is a CGS unit of illuminance equal to 10,000 lux, representing one lumen per square centimeter. It is a larger unit used for measuring very high levels of illumination, particularly in scientific and technical applications where high light intensities are common.
History/Origin
Developed as part of the CGS system of units, where the phot provided a convenient way to express high illumination values. It was widely used in scientific literature and technical applications before the adoption of SI units became standard practice.
Current Use
Primarily found in older scientific literature and specialized technical applications. It provides a practical scale for measuring very bright light sources and is still occasionally referenced in photometric research and historical technical documents.
Multiplier
10000
Offset
0
Lumen per Square Meter to Phot Conversion Table
| Lumen per Square Meter [lm/m²] | Phot [ph] |
|---|---|
| 1 lm/m² | 0.0001 ph |
| 10 lm/m² | 0.001 ph |
| 25 lm/m² | 0.0025 ph |
| 50 lm/m² | 0.005 ph |
| 100 lm/m² | 0.01 ph |
| 0 lm/m² | 0E+0 ph |
| -10 lm/m² | -0.001 ph |
| -40 lm/m² | -0.004 ph |
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