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Illumination Converter

Result

... Phot = ... Lumen per square meter

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Phot to Lumen per square meter Converter

Use this page to convert phot values into lumen per square meter, with background details, formulas, a worked example, and a quick conversion table.

Conversion formula

1 ph = 10,000 lm/m^2

1 lm/m^2 = 0.0001 ph

Example: 500 ph = 5,000,000 lm/m^2

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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.

Lumen per square meter

One lumen per square meter is equal to one lux.

History: Lux is defined as lumen per square meter.

Current use: Used for direct illumination calculations and lighting design.

Also written as lm/m^2.

Phot to Lumen per square meter table

Phot [ph]Lumen per square meter [lm/m^2]
0.01 ph100 lm/m^2
0.1 ph1,000 lm/m^2
1 ph10,000 lm/m^2
2 ph20,000 lm/m^2
5 ph50,000 lm/m^2
10 ph100,000 lm/m^2
20 ph200,000 lm/m^2
50 ph500,000 lm/m^2
100 ph1,000,000 lm/m^2

Frequently asked questions

  • How many Lumen per square meter (lm/m^2) are in one Phot (ph)?

    One Phot equals 10,000 Lumen per square meter.

  • How do you convert Phot to Lumen per square meter?

    Multiply the Phot value by 10,000 to get the result in Lumen per square meter.

  • How do you convert Lumen per square meter back to Phot?

    Multiply the Lumen per square meter value by 0.0001 to get back to Phot.

  • What is 500 Phot in Lumen per square meter?

    500 Phot equals 5,000,000 Lumen per square meter.