Convert lumen/square meter [lm/m^2] to lux [lx] Online | Free lllumination Converter

The Standard Unit of Illuminance

Lumen per square meter (lm/m²), also known as lux, is the standard unit used to measure illuminance, which is the amount of luminous flux (light) falling on a surface per unit area. One lux equals one lumen distributed over one square meter, quantifying how brightly a surface is illuminated.

Lux is widely used in lighting design, architecture, photography, and occupational health to ensure proper lighting conditions for various environments. For instance, office spaces typically require around 300-500 lux to provide comfortable and efficient lighting for work, while outdoor daylight can range from 10,000 to over 100,000 lux.

Understanding illuminance in lux helps in designing lighting systems that optimize visibility, safety, and energy consumption. It allows engineers and designers to calculate how much light a space receives and adjust fixtures or bulbs accordingly.

Lux is preferred globally because it aligns with the metric system and provides a clear, standardized measure of light intensity on surfaces, making it essential for ensuring consistent and effective lighting in both indoor and outdoor settings.

The Standard Unit of Illuminance

Lux (lx) is the SI unit of illuminance, measuring the amount of luminous flux (light) falling on a surface per unit area. One lux is equal to one lumen per square meter (lm/m²). It quantifies how brightly a surface is illuminated, directly relating to human visual perception of light in an environment.

Lux is widely used in various fields such as architecture, photography, horticulture, and workplace safety to ensure proper lighting conditions. For example, typical office lighting ranges from 300 to 500 lux to promote productivity without causing eye strain. Outdoor daylight varies greatly but can reach up to 100,000 lux on a bright sunny day.

Because lux is based on the metric system, it is the preferred unit globally for lighting measurement and design. It helps engineers, designers, and scientists create environments with appropriate lighting levels, balancing visibility, energy efficiency, and comfort.

Understanding lux is essential for interpreting lighting standards, optimizing artificial illumination, and assessing natural light exposure, making it fundamental in both everyday life and technical applications.