Direct Illumination

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Direct Illumination:

Direct Illumination  in which most of the light is  provided from a source without reflection from other surfaces.

In daylighting, this means that the light has travelled on a straight path from the sky (or the sun) to the point of interest.

In electrical lighting it usually describes an installation of ceiling mounted or suspended luminaires with mostly downward light distribution characteristics.

In RENDERlights the direct illumination is provide by various light sources like, Sunlight, spot lights, and omni lights.