Illumination conversion
1 lux (lx) equals 0.0001 phot (ph). Enter any value below to convert from lx to ph.
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1 lx = 0.0001 ph
| Unit | Value |
|---|---|
| Lux lx | 1 |
| Meter-candela m·cd | 1 |
| Centimeter-candela cm·cd | 0.0001 |
| Foot-candela ft·cd | 0.09290304 |
| Phot ph | 0.0001 |
| Nox nox | 1,000 |
| Lumen/square meter lm/m² | 1 |
| Lumen/square centimeter lm/cm² | 0.0001 |
| Lumen/square foot lm/ft² | 0.09290304 |
| Watt/square centimeter (at 555 nm) W/cm² | 0.0000000015 |
Formula
Use this relationship for a direct conversion:
2 lx = 0.0002 ph.
SI relationships follow the cited reference. Conventional and domain-specific factors use the established ConvertWin factor inventory; verify safety-critical work against the governing standard.
Quick reference
| Lux (lx) | Phot (ph) |
|---|---|
| 0.01 | 0.000001 |
| 0.1 | 0.00001 |
| 1 | 0.0001 |
| 2 | 0.0002 |
| 5 | 0.0005 |
| 10 | 0.001 |
| 25 | 0.0025 |
| 50 | 0.005 |
| 100 | 0.01 |
| 1,000 | 0.1 |
From unit
Lux (lx) is the base unit of Illumination in the International System of Units (SI).
Symbol: lx
To unit
Phot (ph) is a unit of Illumination. 1 ph = 10,000 lx
Symbol: ph
Keep converting
Source
The SI framework is checked against NIST Guide for the Use of the International System of Units; conventional factors come from the extended factor inventory. Calculations use full internal precision before display rounding.
View the complete illumination converterQuestions
Use the formula ph = lx x 0.0001. 1 lux (lx) equals 0.0001 phot (ph).
SI relationships follow the cited reference. Conventional and domain-specific factors use the established ConvertWin factor inventory; verify safety-critical work against the governing standard.
