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B

BREAK-OUT
A cable connecting device which breaks a multi-circuit cable (multi- cable) into individual circuits.

BREAKUP
A commonly used abstract GOBO which gives a textured effect to the light, without throwing a specific pattern onto the stage. Used to add interest to light beams. A leafy breakup is used for outdoor scenes / forests / spooky wood etc. to break up the light on the actors faces.

BRIDGE
A walkway, giving access to technical and service areas above the stage or auditorium, or linking fly-floors.

BRIDLE
A rigging device or method which distributes a single point of a load to more than one hanging point.

BSI
British Standards Institute.

BUBBLE

• Jargon for a replacement lamp.
  
• The glass part of a lamp.

BUILD

• During lighting plotting, to construct a state from blackout, or to add to an existing state.
  
• An increase in light or sound level.
  
• A period of set construction ("The Build").

BULGIN
Range of connectors used for multipin or "non-standard" connections. The small 3 pin Bulgin plug is used on the Le Maitre Pyroflash system. The larger 8-pin round "truck plug" allows the connection of 6 dimmer circuits (up to 6A each) via a single multicore cable. This is ideal for carrying multiple dimmed circuits to a moving set-piece or truck. The 8-pin round connector has become a standard for disco lighting systems.

BULGIN PLUG & SOCKET
A bulgin plug or socket is an 8 way mains connection found on lighting controllers. Each Plug or socket can handle up to 4 lighting circuits at 5 Amps per circuit.