Worklight
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In theater, a worklight is a high-intensity lamp which is used to illuminate the stage for the benefit of technicians. Worklights are not designed to light the stage in an aesthetically pleasing way, but rather to be efficient in terms of space and heat; however they may occasionally be used to emphasize plot elements during a show. They are generally near-white, and usually use a twist-lock connector. Worklights are usually placed on catwalks and battens, or can be permanantly built in.
[edit] Types of worklights
Worklights are often built into a theatre as a fluorescent light as in the photo at right. However, some theatres may use, as a supplement to or instead of the fluorescent lights, either the normal stage lights (which produce a lot of heat) or just scoops.