A lavalier microphone or lavalier (also known as a lav, lapel mic, clip mic, body mic, collar mic, neck mic or personal mic) is a small microphone used for television, theatre, and public speaking applications in order to allow for hands-free operation.

Lighting Tree

A structure consisting of an upright pole or truss and a crossbar from which to hang lighting instruments. These are floor supported.


The SI unit of luminous flux, equal to the amount of light emitted per second in a unit solid angle of one steradian from a uniform source of one candela. Larger screen and rooms will require projectors with a higher lumen output.