lx to ph Illuminance Converter
Convert lx to ph instantly with our precise illuminance converter. Use the simple formula 1 lx = 10⁻⁴ ph for accurate photometric calculations.
Lux
Phot
How to convert lx to ph
Three quick steps to switch between lux and phot units.
Enter Your Lux Value
Type the illuminance reading in lux (lx) into the input field.
Apply the Conversion
The tool multiplies your value by 0.0001 (10⁻⁴) automatically.
View the Phot Result
Your converted illuminance in phots (ph) appears instantly.
Why use this lx to ph Converter?
Built for accurate photometric work in any unit system.
The Mathematical Formula
1 lx = 10⁻⁴ ph, because 1 phot equals 1 lumen per cm² while 1 lux equals 1 lumen per m².
Instant Photometric Results
Skip manual math and get reliable conversions in milliseconds.
CGS and SI Compatibility
Perfect for researchers bridging older CGS photometric data with modern SI measurements.
Quick Reference
| Lux | Phot |
|---|---|
| 1 lx | 0.0001 ph |
| 2 lx | 0.0002 ph |
| 5 lx | 0.0005 ph |
| 10 lx | 0.001 ph |
| 20 lx | 0.002 ph |
| 50 lx | 0.005 ph |
Practical Examples of lx to ph
Real-world scenarios where this conversion is useful.
Photography Studio Lighting
Converting 5,000 lx from a softbox into 0.5 ph for CGS-standard documentation.
Solar Irradiance Studies
Translating 100,000 lx direct sunlight into 10 ph for legacy scientific archives.
Industrial Light Meters
Converting 750 lx factory floor readings into 0.075 ph for older equipment specs.
Museum Conservation Reports
Changing 200 lx artifact display levels into 0.02 ph for international photometric records.
Frequently Asked Questions
Common queries regarding this specific conversion.
Q.What is the formula to convert lx to ph?
Multiply the lux value by 0.0001 (10⁻⁴) to get the equivalent in phots.
Q.How many lux are in one phot?
One phot equals exactly 10,000 lux (10⁴ lx).
Q.Is the phot still used today?
The phot is largely historical but still appears in CGS-system literature and older scientific texts.
Q.Can I convert ph back to lx?
Yes, multiply the phot value by 10,000 to get the equivalent in lux.
Discover Related Tools
Need to convert back? Use the reverse Phot to Lux calculator. For other measurements, explore our complete suite of Illuminance Converters or the full Unit Converter Hub.