A [Spatial] that manages a light in [VertexLights3DServer]. A [Spatial] that manages a light in [VertexLights3DServer]. The light's attenuation. The light's color. WHether this light is enabled or not. The light's item cull mask. The light's mode. The light's range. The light's color gets added to the resulting colors. The light's color gets substracted to the resulting colors. The light's color gets blended with the resulting colors.