Converting from Lumen per Square Meter (lm/m²) to Footcandle (fc) | Illuminance

What is Lumen per square Meter (lm/m²)

Lumen per square meter (lm/m²) is a measurement of illuminance that indicates the amount of light falling onto a surface per square meter. It is commonly used in lighting design and engineering to evaluate the brightness of a space.

What is Footcandle (fc)

Footcandle (fc) is another unit of illuminance that measures the amount of light reaching a surface. It is frequently used in the United States and is defined as one lumen of light distributed over a one-square-foot area.

Conversion Formulas

• To convert from lm/m² to fc, use the formula:

fc=lm/m²×0.09290304

• To convert from fc to lm/m², use the formula:

lm/m²=fc×10.76391

Examples

1. Converting 15 lm/m² to fc:

fc=15×0.09290304=1.393546 fc

2. Converting 3 fc to lm/m²:

lm/m²=3×10.76391=32.29173 lm/m²

3. Converting 4 lm/m² to fc:

fc=4×0.09290304=0.3716122 fc

By using these conversion formulas, you can easily switch between lumen per square meter and footcandles to ensure accurate lighting measurements in your projects.