F - Used Product Index

Arc Lamp - An arc lamp is a device that produces light by the sparking (or arcing, from voltaic arc or electric arc) of a high current between two carbon rod electrodes. The rods are touched and then slowly draw. Used Lighting. n apart; as the rods separate the current is "struck" and arcs across the gap in a bright, ionized path. The arc produces a temperature of several thousand degrees, and the tips of th. Used Lighting. e carbon rods are heated to incandescence, creating light. The rods are slowly vaporized during the process and need to be regularly adjusted to maintain the arc. The concept was first demonstrated by Sir Humphry Davy...

Ellipsoidal - Ellipsoidal is the name for a type of theatrical light, getting the name from the ellipsoidal reflector used to intensify the light of a back-loading lamp through the barrel and lens. Ellipsoidals are. Used Lighting. used for their strong, well-defined light and their versatility.

Characteristics of an ellipsoidal lighting unit include:

* An adjustable barrel, allowing a. Used Lighting. lighting designer to change the size and focus of the light thrown by the unit by changing the distance between the mirror and the lens or lenses
* A set of brackets on the end of the barrel for the insertion o...

Preset Boards - Preset boards are the most basic lighting consoles - and also the most prevalent in smaller installations. They consist of two identical fader banks, called 'scenes.' The faders (control slides) on th. Used Lighting. ese scenes can be manually adjusted. Each scene has the same number of channels which control the same dimmers, but only one is live at a time, so the console operator can build a sce. Used Lighting. ne, then fade to it. These scenes are often referred to as A-scenes and B-scenes, and a cross-fader is used to fade between the A and B scene.

Generally, a preset board operator has a cue sheet for each s...

Ethernet - Ethernet (this name comes from the physical concept of ether) is a frame-based computer networking technology for local area networks (LANs). It defines wiring and signaling for the physical layer, an. Used Lighting. d frame formats and protocols for the media access control (MAC)/data link layer of the OSI model. Ethernet is mostly standardized as IEEEs 802.3. It has become the most widespread LA. Used Lighting. N technology in use during the 1990s to the present, and has largely replaced all other LAN standards such as token ring, FDDI, and ARCNET. ...

Scanners - A scanner is an intelligent light that uses a mirror to perform a large variety of effects and operations while the fixture itself remains stationary. Scanners are generally remotely controlled by a l. Used Lighting. ighting control console, but some can be preprogrammed. A single scanner can replace the functions of many conventional lights and can often perform tasks conventional lights can not. Used Lighting. . Most modern scanners utilize DMX-512 signals for control, but some can be controlled by way of analog signals as well. ...