ph to lx Converter - Phot to Lux
Convert ph to lx with our fast, accurate Phot to Lux calculator. 1 phot equals 10,000 lux. Perfect for lighting engineers and photography pros.
Phot
Lux
How to convert ph to lx
Transform phot measurements into lux with one simple multiplication.
Enter the phot value
Type the illuminance amount in ph (phot) into the input field.
Apply the conversion factor
The tool multiplies your input by 10,000, the CGS-to-SI illuminance ratio.
Read the lux result
The equivalent value in lx appears instantly for your lighting calculations.
Why use this ph to lx Converter?
Save time on manual calculations and get reliable, standardized lux results.
The Mathematical Formula
lx = ph × 10,000. Since 1 phot equals 1 lumen per cm² and 1 lux equals 1 lumen per m², the ratio is exactly 10,000 cm² per m².
Instant and Accurate Results
Skip manual arithmetic and avoid rounding errors when handling large illuminance values.
Built for Lighting Professionals
Ideal for cinematographers, photographers, and engineers comparing CGS and SI lighting specs.
Quick Reference
| Phot | Lux |
|---|---|
| 1 ph | 10000 lx |
| 2 ph | 20000 lx |
| 5 ph | 50000 lx |
| 10 ph | 100000 lx |
| 20 ph | 200000 lx |
| 50 ph | 500000 lx |
Practical Examples of ph to lx
Real-world scenarios where this conversion is useful.
Studio Photography Lighting
A 0.5 ph studio lamp converts to 5,000 lx, ideal for portrait setups.
Film Production Setups
A 2 ph key light equals 20,000 lx, matching standard cinema exposure.
Horticulture Grow Lights
A 0.1 ph grow lamp equals 1,000 lx, suitable for shade-loving indoor plants.
Industrial Inspection Booths
A 5 ph inspection light converts to 50,000 lx for high-detail quality control.
Frequently Asked Questions
Common queries regarding this specific conversion.
Q.What is a phot in illuminance measurement?
A phot (ph) is a CGS unit of illuminance equal to one lumen per square centimeter.
Q.How many lux are in one phot?
One phot equals exactly 10,000 lux, since 1 cm² equals 1/10,000 of a m².
Q.Why are ph and lx used in different industries?
Phot appears in older CGS literature, while lux is the modern SI standard used globally today.
Q.Can I convert lx back to ph?
Yes. Divide the lux value by 10,000 to obtain the equivalent phot measurement.
Discover Related Tools
Need to convert back? Use the reverse Lux to Phot calculator. For other measurements, explore our complete suite of Illuminance Converters or the full Unit Converter Hub.