15 Lux to Phot
Quick answer
15 Lux (lx) equals
0.0015 ph
To convert 15 Lux to Phots, multiply by 0.0001. Therefore, 15 Lux (lx) equals 0.0015 Phot (ph).
Formula: ph = lx × 0.0001. Calculation: 15 × 0.0001 = 0.0015 ph.
Convert Lux (lx) to Phot (ph) online with our free unit converter. In illuminance, 1 lx = 0.0001 ph. Explore step-by-step conversion steps, mathematical formulas, and quick conversion reference tables below.
Worked example: converting Lux to Phot
- Step 1 — start with the formula. ph = lx × 0.0001
- Step 2 — substitute your figure. 15 lx × 0.0001
- Step 3 — read the result. 15 lx = 0.0015 ph
- Step 4 — check it in reverse. lx = ph × 10,000 returns 15 lx, which matches the figure you started with.
Illuminance Converter
4 units available
15 lx = 0.0015 ph
Formula:
ph = lx × 0.0001With your value: 15 lx = 0.0015 ph
Other Lux to Phot conversions
Lux to Phot Conversion Table
| Lux (lx) | Phot (ph) |
|---|---|
| 0.5 | 5.000000e-5 |
| 1 | 0.0001 |
| 2 | 0.0002 |
| 5 | 0.0005 |
| 10 | 0.001 |
| 15 | 0.0015 |
| 20 | 0.002 |
| 25 | 0.0025 |
| 50 | 0.005 |
| 100 | 0.01 |
| 250 | 0.025 |
| 500 | 0.05 |
| 1000 | 0.1 |
Phot to Lux Conversion Table
| Phot (ph) | Lux (lx) |
|---|---|
| 0.5 | 5,000 |
| 1 | 10,000 |
| 2 | 20,000 |
| 5 | 50,000 |
| 10 | 100,000 |
| 15 | 150,000 |
| 20 | 200,000 |
| 25 | 250,000 |
| 50 | 500,000 |
| 100 | 1,000,000 |
| 250 | 2,500,000 |
| 500 | 5,000,000 |
| 1000 | 10,000,000 |
Where these values come from
Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.
Lux (lx)
Illuminance
Derived from the lux (1 lx = 1 lm/m²); the foot-candle is 1 lm/ft².
Source: BIPM, The International System of Units (SI), 9th edition, 2019 (updated 2024)
Bureau International des Poids et Mesures · Reviewed 2026-07-01
Phot (ph)
Illuminance
Derived from the lux (1 lx = 1 lm/m²); the foot-candle is 1 lm/ft².
Source: BIPM, The International System of Units (SI), 9th edition, 2019 (updated 2024)
Bureau International des Poids et Mesures · Reviewed 2026-07-01
How to Convert Lux to Phot
To convert from Lux (lx) to Phot (ph), multiply the value by 0.0001.
Formula: ph = lx × 0.0001
Reverse: lx = ph × 10,000
Step-by-Step Example
- Start with your value in Lux. For example: 5 lx
- Multiply by the conversion factor: 5 x 0.0001
- The result is: 0.0005 ph
Lux and Phot Relationship
This calculation facilitates standardized conversion between recognized units of illuminance. Since 1 Lux represents a fraction of a Phot (1 Phot ≈ 10,000 Lux), the Phot is the larger measurement interval. Understanding the relationship between Lux and Phot is essential for accurate calculations in physics, engineering, commerce, and daily applications.
About Lux
Lux (lx) is the SI unit of illuminance, measuring luminous flux per unit area. It is equal to one lumen per square meter.
Fun Fact: Direct sunlight is about 32,000 to 100,000 lux.
Common uses of Lux: lighting design, photography, workspace safety.
About Phot
The Phot (symbol: ph) is a recognized unit in the Standard measurement framework, utilized within illuminance applications for precision and standardized data representation.
Common uses of Phot: illuminance calculations, engineering and science, education.
Frequently Asked Questions
- What is 15 Lux in Phot?
- 15 Lux equals 0.0015 Phot.
- How many Phots are in 1 Lux?
- There are exactly 0.0001 Phots in 1 Lux. This means the conversion factor from Lux to Phot is 0.0001.
- What is the formula to convert Lux to Phot?
- The formula to convert Lux to Phot is: ph = lx × 0.0001. For example, to convert 10 Lux to Phots, you would multiply 10 by 0.0001.
- What is a Lux?
- Lux (lx) is the SI unit of illuminance, measuring luminous flux per unit area. It is equal to one lumen per square meter.
- What is a Phot?
- The Phot (symbol: ph) is a recognized unit in the Standard measurement framework, utilized within illuminance applications for precision and standardized data representation.
- What are the common uses of Lux?
- The Lux is commonly used in lighting design, photography, workspace safety.
Related Illuminance Conversions
Cite this page
UnitConvertLab. (2026). 15 Lux to Phot. UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/15-lux-to-phot