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D
DAISY-CHAINING
Connecting items of equipment together by linking from one to the next in a chain. Used for connecting demux boxes to dimmers etc.
DANCE LIGHTING
Lighting design for Dance is reliant on a great deal of sidelight from BOOMS at the side of the stage. There are normally at least three lanterns on each boom, and three heights - SHINS (to light feet and lower legs), MIDS and HEADS.
DBO
Dead Blackout
DC
Short for DIRECT CURRENT.
DEAD
- A pre-plotted height for a piece of scenery or lighting bar - "that bar's on its dead". The positional indicators on the rope (either PVC tape, or more traditionally cotton tape passed through the strands of the rope) are called DEADS. Sometimes flying pieces are given a number of extra deads, that may be color coded, in addition to the "in dead" (lower) and "out dead" (higher - out of view). In the US, TRIM has the same meaning.
- Scenery or equipment not needed for current production - "that table's dead".
- An electric circuit that has been switched off or has failed - "the circuit's dead, you can change the lamp now"
DEDICATED CFL
A dedicated compact fluorescent lamp is one in which the ballast is hard-wired to lamp holders within a luminair. Since the lamps fit into specially keyed sockets, this type of system ensures that compact fluorescent lamps will be used in the luminair.
DEMUX BOX
Interface unit between the serial digital output of a memory lighting control desk to the parallel analog signal understood by a non-digital dimmer.
DE-RIG
The process of removing lanterns & cabling from flying bars or grid-returning the venue to it's normal state, or as preparation for the next production.
DIAPHRAGM
The part of a microphone which responds to sound waves.
DICHROIC
A type of glass color filter that will give very strong colors without melting under the heat found in most intelligent lighting.
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