Source Radius - Radius of light source shape. Value of 0 will treat the light as Omni Light, greater value than 0 will treat it as a Sphere Light.
Affects Wold - When enabled (the default), the light contributes in the lighting of the level. Disabling it will stop the contribution of the light in the environment.
Cast Shadows - When enabled (the default), the light casts shadows. Turn this option off to disable shadow casting for the light.
Use Inverse Squared Falloff - Whether to use physically based inverse squared distance falloff.
