Phot to Lux
1 Phot equals 10,000 Lux using exact lux-based illuminance definitions.
Direct Answer
1 Phot equals 10,000 Lux
This conversion uses exact lux-based illuminance definitions.
For 10 Phot, the result equals 100,000 Lux.
Converter Calculator
10,000 Lux (lx)
SwitchExplanation
Formula: Lux = Phot × 10,000. Why: phot is tied exactly to lux through the square-centimeter to square-meter area relationship, so the route normalizes through lux before applying the target unit.
Phot (ph): a CGS illuminance unit equal to one lumen per square centimeter, which is exactly 10,000 lux.
Lux (lx): the SI derived unit of illuminance, equal to one lumen incident on one square meter of surface area.
This route is useful when comparing phot-based CGS illuminance values against modern lux-based references in laboratory, optical, and legacy technical material.
This conversion is purely multiplicative because both units reduce through lux using fixed illuminance definitions with no offset.
Common Conversion Values
| Phot (ph) | Lux (lx) |
|---|---|
| 1 | 10,000 |
| 10 | 100,000 |
| 50 | 500,000 |
| 100 | 1,000,000 |
| 300 | 3,000,000 |
| 500 | 5,000,000 |
| 1,000 | 10,000,000 |
| 10,000 | 100,000,000 |
Frequently Asked Questions
What is 1 phot in lux?
1 Phot equals 10,000 Lux on this page.
Does this Phot to Lux page use the exact lux relationship for phot?
Yes. Phot routes use the exact relationship 1 phot = 10,000 lux through one lux normalization path, so CGS and modern lighting references stay consistent across the page.
When would I convert phot to lux?
This route is useful when comparing phot-based CGS illuminance values against modern lux-based references in laboratory, optical, and legacy technical material.
How do I reverse Phot to Lux?
Use the mirror Lux to Phot route; it applies the inverse relationship with the same illuminance assumptions.