A light source is the part of a lighting fixture that emits light, such as a light bulb.
In general, each lighting fixture family has one light source. To create a lighting fixture that uses multiple light sources (such as a chandelier or a set of track lights), create a nested family.
For each light source, you can specify the shape of the light element (point, line, rectangle, or circle), and the light distribution (spherical, hemispherical, spot, or photometric web). You can also define photometric characteristics, such as Light Loss Factor, Initial Intensity, and Initial Color Control. In a project, you can adjust the position and brightness of each light source to achieve the desired lighting effects.
A table lamp and its light source