Convert Phots (ph) to Lux (lx)
Convert Phots to Lux instantly. 1 ph = 10000 lx, so multiply your ph value to get the equivalent in lx.
Formula
1 ph = 10000 lx
To convert ph to lx, multiply the value by 10000.
Conversion Table
| Phots (ph) | Lux (lx) |
|---|---|
| 0.01 ph | 100 lx |
| 0.1 ph | 1000 lx |
| 0.5 ph | 5000 lx |
| 1 ph | 10000 lx |
| 2 ph | 20000 lx |
| 3 ph | 30000 lx |
| 5 ph | 50000 lx |
| 10 ph | 100000 lx |
| 15 ph | 150000 lx |
| 20 ph | 200000 lx |
| 25 ph | 250000 lx |
| 50 ph | 500000 lx |
| 100 ph | 1000000 lx |
| 250 ph | 2500000 lx |
| 500 ph | 5000000 lx |
| 1000 ph | 10000000 lx |
| 2500 ph | 25000000 lx |
| 5000 ph | 50000000 lx |
| 10000 ph | 100000000 lx |
| 50000 ph | 500000000 lx |
Common ph to lx Examples
- 1 ph = 10000 lx
- 5 ph = 50000 lx
- 10 ph = 100000 lx
- 25 ph = 250000 lx
- 50 ph = 500000 lx
- 100 ph = 1000000 lx
- 500 ph = 5000000 lx
- 1000 ph = 10000000 lx
About the units
Phots (ph) — The phot is the CGS illuminance unit (10,000 lux), encountered today almost only in older optics literature.
Lux (lx) — The lux is the SI unit of illuminance — light arriving on a surface. Office lighting is designed around 500 lx, a bright overcast day is ~1,000 lx, and full summer sunlight over 100,000 lx.
Frequently Asked Questions
How do I convert ph to lx by hand?
Take the value in ph and multiply the value by 10000. The result is the same value expressed in lx.
Is the conversion from ph to lx exact?
The ratio 10000 is defined to high precision and is exact for most practical purposes. Rounding only matters when many decimal places are needed.
How much is 1 ph in lx?
1 ph equals 10000 lx. This ratio applies to every conversion between the two units.
What is the formula to convert ph to lx?
The formula is 1 ph = 10000 lx. To convert any value, multiply the value by 10000.
What is the difference between ph and lx?
Both measure Illuminance, but they belong to different unit systems or scales, which is why a conversion factor is needed between them.
Why are there different units for Illuminance?
Different regions and industries developed their own Illuminance standards over time. International trade and science later required conversion tools to bridge them.