Diminished Light.
Real world lights fall off in brilliance with distance. Imagine lights must be told to do this by choosing the "diminishing intensity" switch in the light requester. This fall off is not exactly continuous. There is a central area of unchanging maximum brightness. An even 255 light will shine undiminished for the first 255 units from its center. In like manner, a 64 light will be just as bright for the first 64 units of its spread. If the RGB intensities are uneven, a circle of white light will result, as well as an intermediate band of color. Therefore, one may prefer to use diminished intensity lights when they can be placed beyond their radius of total illumination.
There are some other side effects from using diminished lights. The penumbra formed by the indispensable Soft Edge texture will be lessened within the zone of maximum brightness. Also, specular highlights on objects will be duller when the diminished light is at a distance.
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