Convert Lux to Phot

Please provide values below to convert Lux [lx] to Phot [ph]

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Unit Information

Lux (lx)

Definition: The SI unit of illuminance, equal to one lumen per square meter.

History: From Latin "lux" meaning light.

Current Use: Used for measuring light levels in photography and architecture.

Foot-candle (fc)

Definition: A unit of illuminance equal to one lumen per square foot.

History: Traditional imperial unit.

Current Use: Used in the US for lighting design.

Phot (ph)

Definition: A CGS unit of illuminance equal to 10,000 lux (1 lumen per square centimeter).

History: From Greek "phos" meaning light; used in photometry within the CGS system.

Current Use: Rarely used in modern practice, but appears in legacy literature and some scientific contexts.

Nox (nx)

Definition: An obsolete unit of illuminance equal to 0.001 lux.

History: Historically used to describe very low levels of illumination.

Current Use: Primarily of historical interest; included for completeness and reference.

All Unit Conversions

Lux to Foot-candleLux to PhotLux to NoxFoot-candle to LuxFoot-candle to PhotFoot-candle to NoxPhot to LuxPhot to Foot-candlePhot to NoxNox to LuxNox to Foot-candleNox to Phot

Did you know?

  • Illuminance is the measure of the amount of light falling onto a surface.
  • The SI unit for illuminance is lux (lx), which is one lumen per square meter.
  • Direct sunlight provides an illuminance of about 100,000 lux.

Related Categories

Electromagnetic
Digital Storage
Temperature
Acceleration

Common Conversions

Convert Lux to Foot-candle

lx / 10.764

Convert Foot-candle to Lux

fc * 10.764

Back to All Categories

Convert Lux to Phot

How this conversion works

Converting Lux (lx) to Phot (ph) is straightforward with Unitly. We apply lossless base-unit math under the hood so you get consistent answers whether you are auditing data pipelines, planning infrastructure, or double-checking homework.

Quick reference: 1 lx equals 0.0001 ph. Conversely, 1 ph equals 10,000 lx. Combine these ratios with the in-page calculator to convert any value instantly.

About Lux

Definition: The SI unit of illuminance, equal to one lumen per square meter.

History: From Latin "lux" meaning light.

Current use: Used for measuring light levels in photography and architecture.

About Phot

Definition: A CGS unit of illuminance equal to 10,000 lux (1 lumen per square centimeter).

History: From Greek "phos" meaning light; used in photometry within the CGS system.

Current use: Rarely used in modern practice, but appears in legacy literature and some scientific contexts.

Related conversions

Questions people ask

What is illuminance?
Illuminance measures how much luminous flux is spread over a given area.
How many lumens does a 60W bulb produce?
A standard 60W incandescent bulb produces about 800 lumens.

Need to cite your work? Pair these explanations with our JSON-LD schema (already embedded on the page) so search engines and analytics platforms understand the context behind each conversion.