Directional lighting: focused light as part of direct lighting

Directional light is emitted from point-shaped light sources and belongs to the classification direct lighting. One example from nature is the sun. In contrast to indirect light the light source is usually directed directly at the target surface to be illuminated. A common form of directional or focused light is accent lighting, e.g. via LED spotlights.

What is directional light?

Directional light is a type of direct lighting that is concentrated on a narrow area. The illuminated area thus stands out from its surroundings due to strong contrast and the rest of the surroundings remains darker. Directional light can be used in a focused way as accent lighting or in a planar way as general lighting.

In a lighting situation, direct, directional lighting can also provide uniform general lighting on the horizontal plane. The special feature of this lighting: the floor is illuminated while the ceiling remains dark, and beams of light (scallops) are seen on the walls. The height of the light beam on the wall depends on the respective light distribution.

For what is directional lighting suitable?

Directional lighting can also be used in accent lighting. With the targeted spotlighting of objects, e.g. in galleries and museums or with architectural features, specific areas or elements can be highlighted. This contributes to a hierarchy of perception. Directional light causes strong shadows due to pronounced modelling.

Directional lighting is suitable in various situations and areas. Interiors that require focused lighting can benefit from directional lighting. The classic application for directional light is accent lighting in exhibitions, but directional light is also used in offices. For example, when high brightness and targeted light are needed for certain tasks.

Directional light opens up a wide range of options for lighting design: focused light not only creates exciting effects such as shadows and reflections, but the choice of beam angle and beam direction also enable the influencing of direction of gaze and attention. In contrast to diffuse lighting, which affects the entire room from the light source, the effect of focused light depends on the position of the luminaire.

Good to know:

When planning directional lighting components, the expectations of light direction and light colour resulting from the elementary experience of daylight should be taken into account. Thus, the directed light comes from above or laterally, but never from below. The colour of sunlight is significantly warmer than that of diffuse daylight. Therefore, lighting in which directional light comes obliquely from above and has a warmer light colour than diffuse general lighting is perceived as natural. The use of deviating light directions and colour temperature combinations is possible, but leads to particularly striking effects.

Which luminaires emit directional light?

LED spotlights (e.g. for track) and downlights are commonly used LED luminaires for interiors that produce directional light. These types of luminaires are designed to emit light in a specific direction, allowing the targeted illumination of specific areas. LED spotlights and track luminaires have adjustable heads that can be panned or tilted to direct the light beam. In this way precise lighting effects can be achieved.

Pendant luminaires as suspended luminaires are often used to draw the gaze and attention to certain surfaces, such as reception desks and tables.
In addition, some LED wall luminaires and wall-mounted luminaires can also produce directional light. These luminaires are designed to direct light either upwards or downwards, creating a focused and accentuated lighting effect.