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Illumination Converter
Result
... Phot = ... Lux
Find the units to convert
Phot to Lux Converter
Use this page to convert phot values into lux, with background details, formulas, a worked example, and a quick conversion table.
Conversion formula
1 ph = 10,000 lx
1 lx = 0.0001 ph
Example: 500 ph = 5,000,000 lx
Phot
One phot is equal to 10000 lux.
History: The phot is a CGS photometric unit equal to one lumen per square centimeter.
Current use: Used mainly in older photometric tables and reference conversions.
Also written as ph.
Lux
Lux measures luminous flux incident on a surface per square meter.
History: Lux is the SI unit for illumination or illuminance.
Current use: Used in lighting design, workplace standards, photography, displays, architecture, and safety guidelines.
Also written as lx.
Phot to Lux table
| Phot [ph] | Lux [lx] |
|---|---|
| 0.01 ph | 100 lx |
| 0.1 ph | 1,000 lx |
| 1 ph | 10,000 lx |
| 2 ph | 20,000 lx |
| 5 ph | 50,000 lx |
| 10 ph | 100,000 lx |
| 20 ph | 200,000 lx |
| 50 ph | 500,000 lx |
| 100 ph | 1,000,000 lx |
Frequently asked questions
How many Lux (lx) are in one Phot (ph)?
One Phot equals 10,000 Lux.
How do you convert Phot to Lux?
Multiply the Phot value by 10,000 to get the result in Lux.
How do you convert Lux back to Phot?
Multiply the Lux value by 0.0001 to get back to Phot.
What is 500 Phot in Lux?
500 Phot equals 5,000,000 Lux.