Lux to Phot Converter
Convert lux to phot instantly.
Standard illuminance units
foot-candle 9.29
phot 0.01
millilux 100000
kilolux 0.1
Fun comparisons
full moon nights 🌕~ 400
office lighting levels 🏢~ 0.2
overcast day levels ☁️~ 0.1
operating room levels 🏥~ 0.01
direct sunlight levels ☀️~ Less than 0.01
How to convert lux to phot
Enter your illuminance in lux and get the equivalent in phot instantly. Key reference points: direct sunlight provides about 100,000 lux, a typical office is 300-500 lux (28-46 foot-candles), and a full moon provides about 0.25 lux.
Lux is the modern SI illuminance unit; phot is the CGS unit equal to 10,000 lux, historically used in older photographic and photometric literature but rarely in modern practice.
Need the opposite direction? Convert phot to lux just as easily, or explore all our illuminance conversions.
Common lux to phot conversions
| Lux (lx) | Phot (ph) |
|---|---|
| 1 | 0.0001 |
| 5 | 0.0005 |
| 10 | 0.001 |
| 25 | 0.0025 |
| 50 | 0.005 |
| 100 | 0.01 |
| 500 | 0.05 |
| 1000 | 0.1 |
Frequently asked questions
1 lux equals 0.0001 phot.
Multiply by 0.0001. For example, 5 lx = 0.0005 ph.
Direct sunlight at noon provides about 100,000 lux, which equals 10 phot.
1 phot equals 10000 lux.
100 lux equals 0.01 phot.