Light is a directional light source. It is equivalent to using a point light source at an infinite distance.
Spot
2
Light is a spotlight source. It is similar to a point light, except that the area of illumination is limited to a cone. This light type has a direction and several other parameters that determine the shape of the cone it produces. For more information, see the Light class.
Point
1
Light is a point source. The light has a position in space and radiates light in all directions.
Remarks
Directional lights are slightly faster than point lights, but point lights look a little better. Spotlights offer interesting visual effects but are slow.