[6.1] A generic term for a manufactured source created to produce optical radiation. By extension, the term is also used to denote sources that radiate in regions of the spectrum adjacent to the visible.

Note: Through popular usage, a portable luminaire consisting of a lamp with shade, reflector, enclosing globe, housing, or other accessories is also called a “lamp.” In such cases, in order to distinguish between the assembled unit and the light source within it, the latter is often called a “bulb” or “tube,” if it is electrically powered. (See also luminaire (light fixture).)

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