REFERENCE

Light Types

Null
Emits no light at all. You can quickly switch off a light by changing it type to Null. You can also use Null lights to create glowing points.
Parameters :

Glow

Point
Emits light in all directions. In the real-world, light bulbs or candle lights act much as Point Lights.
Parameters :

Name
Intensity
Position
Glow
Falloff
Shadows

Spot
Emits a cone of light. Spot lights are the most heavily used type of lights in computer graphics because they offer a great level of control.
Parameters :

Name
Intensity
Position
Interest
Glow
Falloff
Shadows

Sun
Emits light in one direction only. They are used to mimic infinitely distant point lights like the sun. Most of the time they are used as the main key light in outdoor scenes.
Parameters :

Name
Intensity
Position
Interest
Glow
Falloff
Shadows

Mapper
Emits no light at all. Allows to precisely position texture maps in ShaderMaker using the meta-phore of the slide-projector.
Parameters :

Name
Position
Interest

Ambient
Emits light in no precise direction everywhere in the scene. It is not really a light. It acts more like a global lighting offset. The ambient light can be found in the Render Setup dialog box.
Parameters :

Color