Ray characteristics

The radiation characteristics describe how light is radiated by a light source and is distributed in the room. It depends on the position of the light source and its optical properties. The radiation characteristics are crucial in planning lighting systems because it influences the lighting effect and the area of ​​application. There are symmetrical radiation characteristics, as with Spots And downlights that create even cones, and asymmetrical characteristics that are used, for example, for wall lights or floods to specifically steer light in one direction.

The beam angle also plays an important role: the half -value angle indicates the area to which the light intensity is at least 50 %, while the field angle defines the outer area of ​​the light cone. Lights for certain applications.
A distinction can be made between symmetrical and asymmetrical radiation characteristics. Spots and downlights have a symmetrical light cone, whereas in the case of wall or hallway floods is set to asymmetry.