What does LUX and LUMEN mean?Updated 8 months ago

Lumens (lm) indicates the total amount of visible light emitted by a source, regardless of the area it covers. In simpler terms, lumens quantify the brightness of a light source as perceived by the human eye.

Lux (lx) indicates the amount of light that falls on a specific area or surface. It takes into account both the intensity of the light source (in lumens) and the distance from the source to the area being illuminated. Lux is used to evaluate the brightness of a given scene or the lighting conditions at a particular spot. This is why a Lux measurement should always include a distance coefficient. 

We often use a bucket of water as an analogy. The water in the bucket is lumens. It simply describes the amount of water inside the bucket. Now imagine you try to throw that bucket of water as far as you can. Lux would be the amount of water that reaches a given distance. For more on this topic, check out our blog post.