Converting from Lumen per Square Meter (lm/m²) to Phot (ph) | Illuminance

What is Lumen per Square Meter (lm/m²)

Lumen per Square Meter (lm/m²) is a unit of measurement that represents illuminance, which is the amount of light that falls on a surface. It is used to quantify the intensity of light hitting a specific area.

What is Phot (ph)

Phot (ph) is another unit of illuminance that measures the amount of light incident on a surface. It is defined as the illuminance produced by a luminous flux of one lumen uniformly distributed over a surface area of one square meter.

Conversion Formulas

Illuminance can be converted between lumen per square meter and phot using the following formulas:

1. To convert from lm/m² to ph:

Illuminance in ph=Illuminance in lm/m²×0.0001

2. To convert from ph to lm/m²:

Illuminance in lm/m²=Illuminance in ph×10000

Examples

1. Converting 15 lm/m² to ph:

15lm/m²=15×0.0001=0.0015ph

2. Converting 16 ph to lm/m²:

16ph=16×10000=160000lm/m²

3. Converting 14 lm/m² to ph:

14lm/m²=14×0.0001=0.0014ph

Use these conversion formulas to easily switch between lumen per square meter and phot when working with illuminance measurements in lighting applications.