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Light Converters
Illumination Converter
Result
... Lumen per square foot = ... Phot
Find the units to convert
Lumen per square foot to Phot Converter
Use this page to convert lumen per square foot values into phot, with background details, formulas, a worked example, and a quick conversion table.
Conversion formula
1 lm/ft^2 = 0.00107639104167097 ph
1 ph = 929.0304 lm/ft^2
Example: 500 lm/ft^2 = 0.538195520835486 ph
Lumen per square foot
One lumen per square foot is equal to 1 / ft^2 lux.
History: Lumen per square foot is the dimensional form of the foot-candle.
Current use: Used in US lighting practice and illumination conversions.
Also written as lm/ft^2.
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 foot to Phot table
| Lumen per square foot [lm/ft^2] | Phot [ph] |
|---|---|
| 0.01 lm/ft^2 | 0.0000107639104167097 ph |
| 0.1 lm/ft^2 | 0.000107639104167097 ph |
| 1 lm/ft^2 | 0.00107639104167097 ph |
| 2 lm/ft^2 | 0.00215278208334195 ph |
| 5 lm/ft^2 | 0.00538195520835486 ph |
| 10 lm/ft^2 | 0.0107639104167097 ph |
| 20 lm/ft^2 | 0.0215278208334195 ph |
| 50 lm/ft^2 | 0.0538195520835486 ph |
| 100 lm/ft^2 | 0.107639104167097 ph |
Frequently asked questions
How many Phot (ph) are in one Lumen per square foot (lm/ft^2)?
One Lumen per square foot equals 0.00107639104167097 Phot.
How do you convert Lumen per square foot to Phot?
Multiply the Lumen per square foot value by 0.00107639104167097 to get the result in Phot.
How do you convert Phot back to Lumen per square foot?
Multiply the Phot value by 929.0304 to get back to Lumen per square foot.
What is 500 Lumen per square foot in Phot?
500 Lumen per square foot equals 0.538195520835486 Phot.