Lux
Lux (lux) - the SI unit of illuminance E (SI derived unit). The name comes from the Latin lux = light.
1 lx = 1 cd·sr / m2
Lux (lx) is defined as the illumination caused by a uniformly distributed luminous flux of 1 lumen (lm) incident on an area of 1m2, so: 1 lx = 1 lm / m2. An aliquot of a lux, a millilux, is called nox (nx). The name comes from the Latin nox = night. 1 nx = 0.001 lx = 1 mlx
What is a lux?
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Lux: The unit of illuminance
The question “What is a lux?” often arises when comparing different lighting solutions or verifying whether a space meets design requirements. In the simplest terms, lux measures the amount of light falling onto a given surface.
One lumen distributed evenly over one square meter equals one lux. This definition makes it easier to understand the difference between luminous flux and illuminance. Luminous flux describes how much light a luminaire emits, while illuminance indicates how much of that light actually reaches the intended area.
For our team, this is one of the key parameters considered when planning lighting installations. Even a highly efficient luminaire may fail to perform its intended function if it is poorly positioned or installed at an inappropriate mounting height. That is why we analyze room layouts, surface colors, mounting heights, and the intended use of the space before selecting a lighting solution.
In what situations is lux used?
Illuminance is evaluated wherever lighting is intended to support specific activities. The requirements for a warehouse differ from those of an office workstation, parking area, corridor, retail space, or sports facility.
Measurements and calculations help determine whether users can work comfortably, move safely, and clearly recognize their surroundings. In practical lighting design, lux serves as a common reference point for discussing lighting quality among investors, designers, and luminaire manufacturers.
Accurate calculations also help avoid the unnecessary installation of excessive numbers of luminaires, reducing energy consumption and simplifying future maintenance.
Lux (lx): Key information
Well-designed lighting should reflect the actual way a space is used. Insufficient light levels can make work more difficult and reduce the sense of safety, while excessive illuminance may result in unnecessary energy costs.
For this reason, modern lighting projects focus on achieving the right balance between regulatory requirements, user comfort, and luminaire efficiency.
As an LED lighting manufacturer, we provide solutions that help achieve the required lighting parameters across a wide range of applications. Our experience, technological expertise, and lighting control systems enable us to tailor illumination more effectively to the needs of each project.
Understanding lighting units makes it easier to select the right luminaires and highlights why professional lighting design is essential to the overall performance of an installation. We support our customers with technical knowledge, configurators, and products designed for durability, energy efficiency, and aesthetic integration.
As a result, lighting becomes more than just a technical component. It becomes a tool for improving functionality, safety, and the overall quality of everyday use within any facility.