Phot to Lux Converter
Convert Phot (ph) to Lux (lx) instantly. 1 ph = 10,000 lx.
Illuminance Converter
4 units available
1 ph = 10,000 lx
Formula:
lx = ph × 10,000With your value: 1 ph = 10,000 lx
Other Phot to Lux conversions
Phot to Lux Conversion Table
| Phot (ph) | Lux (lx) |
|---|---|
| 0.5 | 5,000 |
| 1 | 10,000 |
| 2 | 20,000 |
| 5 | 50,000 |
| 10 | 100,000 |
| 15 | 150,000 |
| 20 | 200,000 |
| 25 | 250,000 |
| 50 | 500,000 |
| 100 | 1,000,000 |
| 250 | 2,500,000 |
| 500 | 5,000,000 |
| 1000 | 10,000,000 |
Lux to Phot Conversion Table
| Lux (lx) | Phot (ph) |
|---|---|
| 0.5 | 5.000000e-5 |
| 1 | 0.0001 |
| 2 | 0.0002 |
| 5 | 0.0005 |
| 10 | 0.001 |
| 15 | 0.0015 |
| 20 | 0.002 |
| 25 | 0.0025 |
| 50 | 0.005 |
| 100 | 0.01 |
| 250 | 0.025 |
| 500 | 0.05 |
| 1000 | 0.1 |
Where these values come from
Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.
Phot (ph)
Illuminance
Derived from the lux (1 lx = 1 lm/m²); the foot-candle is 1 lm/ft².
Source: BIPM, The International System of Units (SI), 9th edition, 2019 (updated 2024)
Bureau International des Poids et Mesures · Reviewed 2026-07-01
Lux (lx)
Illuminance
Derived from the lux (1 lx = 1 lm/m²); the foot-candle is 1 lm/ft².
Source: BIPM, The International System of Units (SI), 9th edition, 2019 (updated 2024)
Bureau International des Poids et Mesures · Reviewed 2026-07-01
How to Convert Phot to Lux
To convert from Phot (ph) to Lux (lx), multiply the value by 10,000.
Formula: lx = ph × 10,000
Reverse: ph = lx × 0.0001
Step-by-Step Example
- Start with your value in Phot. For example: 5 ph
- Multiply by the conversion factor: 5 x 10,000
- The result is: 50,000 lx
About Phot
The phot (ph) is a unit of illuminance. One phot equals 10000 luxs. UnitConvertLab converts it against every other illuminance unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.
Common uses: illuminance calculations, engineering and science, education.
About Lux
Lux (lx) is the SI unit of illuminance, measuring luminous flux per unit area. It is equal to one lumen per square meter.
Fun Fact: Direct sunlight is about 32,000 to 100,000 lux.
Common uses: lighting design, photography, workspace safety.
Frequently Asked Questions
How many Lux are in 1 Phot?
There are exactly 10,000 Lux in 1 Phot. This means the conversion factor from Phot to Lux is 10,000.
What is the formula to convert Phot to Lux?
The formula to convert Phot to Lux is: lx = ph × 10,000. For example, to convert 10 Phot to Lux, you would multiply 10 by 10,000.
What is a Phot?
The phot (ph) is a unit of illuminance. One phot equals 10000 luxs. UnitConvertLab converts it against every other illuminance unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.
What is a Lux?
Lux (lx) is the SI unit of illuminance, measuring luminous flux per unit area. It is equal to one lumen per square meter.
What are the common uses of Phot?
The Phot is commonly used in illuminance calculations, engineering and science, education.
Related Illuminance Conversions
Cite this page
UnitConvertLab. (2026). Phot to Lux converter. UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/phot-to-lux