Basic interior lighting concept

Interior lighting refers to the set of techniques, systems and devices used to provide artificial light within closed spaces, with the aim of guaranteeing adequate visibility and improving visual comfort. Its fundamental function is to allow human activities to develop efficiently and safely at night or in conditions of little natural light.

In addition to its practical function, interior lighting also influences the aesthetics, atmosphere and perception of space, being a key element in the architectural design and environmental quality of buildings. Therefore, its correct planning and execution is essential for functionality and well-being in the interiors.

Properties of light indoors

Light has physical and perceptual properties that directly affect its behavior in interior spaces. Among the most important are luminous intensity, distribution, color and color rendering index. Intensity determines how bright the light is, while distribution indicates how it is dispersed within space.

The color of light, measured in degrees Kelvin, influences the atmosphere of the environment; For example, warm light generates cozy sensations, while cold light can increase concentration. The color rendering index (CRI) measures the ability of a light source to display the true colors of objects, being vital for applications where color perception is critical.

The interaction of light with interior surfaces is also essential. Materials with high reflectance can improve luminous efficiency, while dark or matte finishes absorb more light, requiring greater lighting power.

Units and measurements in lighting

Several fundamental units are used to evaluate and design interior lighting systems. Lumen (lm) measures luminous flux, that is, the total amount of light emitted by a source. Lux (lx) represents illuminance, which is the amount of light that falls on a surface per unit area.