Light distribution angle
Determines how wide the light is emitted. With rotationally symmetrical light distribution, it is the angle between the axis of the lamp and the direction of light, the value of which is 50% of the maximum light intensity. The unit is the degree [°].
What is the light beam angle?
The light beam angle, also referred to as the beam spread angle, is a parameter that precisely defines the directional range of light emitted by a light source, such as an LED luminaire or a light bulb.
The angle at which light is distributed plays an important role in a wide range of applications, including accent, stage, and emergency lighting. Depending on the desired effect, light sources with different beam angles are selected to achieve the appropriate illumination of a given space. For example, narrow beam angles create a focused light beam that highlights selected objects or areas. In contrast, wide beam angles are ideal for providing uniform illumination across larger spaces.
Light beam angle parameters
Beam angles are generally classified as either narrow or wide. A narrow beam angle typically refers to a value of up to 30 degrees. In this case, the light is concentrated, creating a clearly defined and focused beam.
A wide beam angle, on the other hand, usually ranges from 90 to 180 degrees. It allows light to be distributed evenly across large areas. The choice of beam angle should always be tailored to the intended function of the space and the desired lighting effect.
Measuring the light beam angle
The light beam angle is most commonly expressed in degrees. It can be measured using a goniometer, a specialized instrument designed for angle measurements. It may also be determined with the use of a light distribution analyzer.
Beam angle information is an important part of a light source's technical specifications and is frequently included in lighting product catalogs.
Light beam angle as a key factor in lighting design
Selecting the correct beam angle is a crucial aspect of lighting system design. It helps improve lighting efficiency while enhancing the visual appeal of a space. Lighting designers take beam angle into account when developing lighting concepts to ensure that installations meet both functional and aesthetic requirements.
How to choose the right beam angle for different applications
The beam angle of a light source plays a significant role in lighting design, whether the primary objective is comfort and safety or creating a decorative visual effect. There is no single solution that works best for every application, such as staircases, offices, or corridors, because the optimal choice depends on several factors. These include the room layout, intended use, ceiling height, room volume, and the atmosphere that the lighting is meant to create. Every space requires an individual lighting approach.
A narrow beam angle is ideal in locations where intense illumination is needed within a limited area. Examples include assembly workbenches in workshops and individual workstations in offices.
A wide beam angle is the preferred solution when illuminating larger areas, such as corridors, open-plan offices, or other spacious environments, where uniform light distribution is required.