How to convert phots to lux
lx = ph × 10,000Multiply the value in phots by 10,000. To go the other way, multiply by 0.0001 (or divide by 10,000).
A phot is larger than a lux: one phot contains 10,000 lux.
Worked examples
- 1 phot1 ph × 10,000 = 10,000 lx
- 5 phots5 ph × 10,000 = 50,000 lx
- 10 phots10 ph × 10,000 = 100,000 lx
- 20 phots20 ph × 10,000 = 200,000 lx
- 100 phots100 ph × 10,000 = 1,000,000 lx
Phots to lux conversion table
Values are calculated by the conversion engine and rounded to 8 significant figures.
| Phots (ph) | Lux (lx) |
|---|---|
| 0.1 ph | 1,000 lx |
| 0.25 ph | 2,500 lx |
| 0.5 ph | 5,000 lx |
| 1 ph | 10,000 lx |
| 2 ph | 20,000 lx |
| 3 ph | 30,000 lx |
| 4 ph | 40,000 lx |
| 5 ph | 50,000 lx |
| 6 ph | 60,000 lx |
| 7 ph | 70,000 lx |
| 8 ph | 80,000 lx |
| 9 ph | 90,000 lx |
| 10 ph | 100,000 lx |
| Phots (ph) | Lux (lx) |
|---|---|
| 12 ph | 120,000 lx |
| 15 ph | 150,000 lx |
| 20 ph | 200,000 lx |
| 25 ph | 250,000 lx |
| 30 ph | 300,000 lx |
| 40 ph | 400,000 lx |
| 50 ph | 500,000 lx |
| 75 ph | 750,000 lx |
| 100 ph | 1,000,000 lx |
| 250 ph | 2,500,000 lx |
| 500 ph | 5,000,000 lx |
| 1,000 ph | 10,000,000 lx |
About the units
Phot (ph)
The phot (ph) is a unit of illuminance in the centimetre–gram–second (CGS) system. One phot equals 10,000 lux (lx).
Lux (lx)
One lumen per square metre.
Frequently asked questions
How many lux are in one phot?
There are 10,000 lux in one phot, and this value is exact by definition.
How do I convert phots to lux?
Multiply the number of phots by 10,000. For example, 10 ph × 10,000 = 100,000 lx.
How many phots are in one lux?
One lux equals 0.0001 phots. That is the reverse factor, 1 ÷ 10,000.
What is 10 phots in lux?
10 ph = 100,000 lx.
Is this ph to lx converter accurate?
Yes. Both units are defined exactly in terms of SI units, so the conversion factor is exact; results are shown to 12 significant figures by default and you can change precision in the converter. Calculations run in your browser using the same tested engine that generated this page.