Illuminance
Browse Illuminance conversions1 lux = 0.0001 phot
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Formula Summary
Result: 1 lux = 0.0001 phot
Formula: (1 x 1) / 10000
Rounding: Displayed to 6 decimal places by default, trimmed for readability. Use Detailed or Scientific for more precision.
Real World Context
0.0001 phot is approximately:
- on a twilight or very dim pathway-lighting scale
Unit Story
Lux
Lux measures how much visible light reaches a surface. One lux equals one lumen spread across one square meter.
Phot
The phot is a CGS illuminance unit equal to 10,000 lux. It appears mainly in older scientific and technical references.
How This Conversion Works
Lux and phot are both used for illuminance conversions. This page converts 1 lux into 0.0001 phot using the formula shown below.
Use this result for quick checks, comparisons, and everyday reference. For work that depends on exact precision, review the rounding setting and the assumption note before using the number.
The precision controls let you switch between a shorter result, the standard readable result, and scientific notation when the value is very large or very small.
Unit Notes
- lux (lx) is the base unit used for illuminance conversions.
- 1 phot (ph) equals 10000 lux.
Questions
How do you convert lux to phot?
This page converts lux to phot using this formula: (1 x 1) / 10000.
What is 1 lux in phot?
1 lux equals 0.0001 phot.
How many decimals does this converter show?
Displayed to 6 decimal places by default, trimmed for readability. Use Detailed or Scientific for more precision. The precision buttons can also show a shorter result or scientific notation.
Equivalent Values
Nearby Values
Full Details
- Formula
- (1 x 1) / 10000
- Rounding
- Displayed to 6 decimal places by default, trimmed for readability. Use Detailed or Scientific for more precision.
- Assumption
- Illuminance measures luminous flux arriving on a surface. It is not the same as total lumens or luminance. Real lighting levels vary with distance, angle, weather, fixtures, reflections, and measurement position.
