There are two different kinds of shadows that lights may cast: buffered and ray-traced.
As a result they can cast accurate raytraced soft shadows, at the expense of additional render time. Area: These are similar to point lamps, except that they are rectangular.Similar to Sun, its position does not matter, only its direction. Great for use as a fill light, or as a back light, or to represent light from the sky. Hemi: 180°-wide uniform, shadowless light source.They are also the only light source that can cast buffer shadows (see below). They are the only light source that can be made visible with the 'halo' option, to simulate light in a fog. Spot: Spot lights produce light constrained to a cone-shaped beam, and have some special features.Good to use in brightly-lit outdoor scenes (i.e. Because the sun is (effectively) infinitely far away, the position of this lamp does not matter, only its direction. Sun: A light with parallel rays that will illuminate the scene with an even light.if there is a lightbulb or candle or something in the scene, position one of these within it to give the impression of light coming from that object. Can represent light sources within the scene e.g. The shadows can be sharp, or you can set its size to something nonzero to make the shadows fuzzy. Blender provides several different kinds of lights:
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