Converter group
Light Converters
Illumination Converter
Result
... Lux = ... Phot
Find the units to convert
Lux to Phot Converter
Use this page to convert lux values into phot, with background details, formulas, a worked example, and a quick conversion table.
Conversion formula
1 lx = 0.0001 ph
1 ph = 10,000 lx
Example: 500 lx = 0.05 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
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 to Phot table
| Lux [lx] | Phot [ph] |
|---|---|
| 0.01 lx | 0.000001 ph |
| 0.1 lx | 0.00001 ph |
| 1 lx | 0.0001 ph |
| 2 lx | 0.0002 ph |
| 5 lx | 0.0005 ph |
| 10 lx | 0.001 ph |
| 20 lx | 0.002 ph |
| 50 lx | 0.005 ph |
| 100 lx | 0.01 ph |
Frequently asked questions
How many Phot (ph) are in one Lux (lx)?
One Lux equals 0.0001 Phot.
How do you convert Lux to Phot?
Multiply the Lux value by 0.0001 to get the result in Phot.
How do you convert Phot back to Lux?
Multiply the Phot value by 10,000 to get back to Lux.
What is 500 Lux in Phot?
500 Lux equals 0.05 Phot.