Convert Phot to Lux
Type the number of phots that you wish to convert to lux.
How to Convert Phots to Lux
The phot and lux are both units of illuminance. By definition, 1 phot equals exactly 10000 lux. This means to convert phots to lux, you multiply by 10000.
Formula
Step-by-Step Example
Convert 5 ph to lux:
We need to convert phots to lux
Since 1 ph = 10000 lx, multiply by 10000
5 × 10000 = 50000
5 ph = 50000 lx
Phot to Lux Conversion Table
Quick reference table for common phot to lux conversions. Click any value for detailed calculation.
| Phots (ph) | Lux (lx) |
|---|---|
| 0.1 ph | 1000 lx |
| 0.5 ph | 5000 lx |
| 1 ph | 10000 lx |
| 2 ph | 20000 lx |
| 5 ph | 50000 lx |
| 10 ph | 100000 lx |
| 25 ph | 250000 lx |
| 50 ph | 500000 lx |
| 100 ph | 1000000 lx |
About These Units
Phot (ph)
The phot (ph) is the CGS unit of illuminance equal to 10,000 lux or 1 lumen per square centimeter. Very bright: full sunlight is about 10 phots. Found in older scientific literature. One phot = 929 foot-candles. Largely replaced by lux in modern usage.
Lux (lx)
The lux (lx) is the SI unit of illuminance, measuring luminous flux per area (lumens per square meter). Typical values: moonlight 0.1 lx, office 300-500 lx, overcast day 1,000 lx, operating room 10,000 lx, direct sunlight 100,000 lx. Used in lighting design, photography, and workplace safety standards.
Frequently Asked Questions
How do I convert phots to lux?
To convert phots to lux, multiply the value by 10000. For example, 10 ph = 100000 lx.
How many lux are in 1 phot?
1 phot equals 10000 lux.
What is the formula for phots to lux?
The formula is: lx = ph × 10000.