The Lux (lx) in Illuminance

What is Lux (lx)

Lux, often abbreviated as lx, is a unit of measurement for illuminance. It represents the amount of light that is received on a surface per unit area. Specifically, one lux is defined as one lumen per square meter (1lx=1lm/m²). This means that if one lumen of light is spread evenly over an area of one square meter, the resultant illuminance is one lux.

Lux is widely used in various fields, including photography, architecture, and horticulture, to ensure that lighting conditions match the requirements for visibility, comfort, and performance. For example, a typical office environment may require illuminance levels of around 300 to 500 lux for optimal productivity, while a well-lit classroom might need around 500 to 700 lux.

Common Conversion Values

To understand and compare illuminance levels in different units, here are some common conversion values involving lux:

• 1lx=1lm/m²
• 1lx=0.0001lm/cm²
• 1lx=0.09290304lm/ft²
• 1lx=0.00064516lm/in²

• 1lx=0.09290304fc (footcandle)

• 1lx=0.0001ph (phot)

These conversion values allow for easier comprehension and application of illuminance across different measurement systems. For example, if you need to convert a light level of 500 lux into footcandles, you can use the conversion factor:

Thus, it is helpful to know these conversion values to adapt lighting to meet specific needs in various settings, whether for artistic purposes, safety regulations, or comfort levels.

By utilizing lux and its conversions effectively, one can create well-lit environments that enhance productivity, safety, and enjoyment.