How many Lumen per Square Foot are in 1 Phot?

One phot equals 929.031299 lumen per square foot.

Can I convert Lumen per Square Foot back to Phot?

Yes. Enter a value in either field to convert from Phot (ph) to Lumen per Square Foot (lm/ft²) or the reverse — results update instantly.

ph → lm/ft²

Convert between lux, foot-candles, and more illuminance units. Essential for lighting design, photography, and building codes.

From

Enter a value above, select your units, and get instant results. Works both ways — Phot to Lumen per Square Foot or Lumen per Square Foot to Phot.

Formula: Lumen per Square Foot = Phot × 929.031299

Enter the value you want to convert in the "Phot" field.
Select "Phot" as your "From" unit.
Select "Lumen per Square Foot" as your "To" unit.
The converted result appears instantly in the "Lumen per Square Foot" field.
To reverse the conversion, enter a value in the "Lumen per Square Foot" field instead.

Multiply your phot value by 929.031299. For example, 10 ph = 9,290.312991 lm/ft².

Check out our comprehensive guides on unit conversions, measurement systems, and conversion tips.

Explore all illuminance converter tools in our Illuminance Converter hub or try the bulk converter.