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Incandescent light bulb - The incandescent light bulb (archaically known as the electric lamp) uses a glowing wire filament heated to white-hot by electrical resistance, to generate light (a process known as thermal radiation . Used . or incandescence). The bulb is the glass enclosure which keeps the filament in a vacuum or low-pressure noble gas, or a halogen gas in the case of quartz-halogen lamps (see below) in order to. Used . prevent oxidisation of the filament at high temperatures. In Australia and South Africa a light bulb is also called a light globe.

Because of its poor efficiency and yellowish color, it is being ...

Zone System - A unique method introduced by photographers Ansel Adams and Fred Archer around 1940 for determining the best exposure and correct development for an individual photograph by way of analysiing the subj. Used . ects luminosities in terms of ten gray tones or “zones” labled 0 to IX or zero to nine and visualizing them as print densities. The zone system gives photographers a systematic method for ac. Used . curately identifing the relationship between the way they see the photographic subject and the results they achieve in their finished works....

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 . used for their strong, well-defined light and their versatility.

Characteristics of an ellipsoidal lighting unit include:

* An adjustable barrel, allowing a lightin. Used . g 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...

Memory Consoles - Memory-based consoles have become very popular in almost all larger installations, particularly theatres. These new types of controls have completely replaced preset consoles as controllers of choice. Used . . Memory consoles are preferable in productions where scenes do not change from show to show, such as a theatre production, because scenes are designed and digitally recorded, so there is les. Used . s room for human error, and less manpower is required to produce the same result.

Memory consoles have a bank of faders called 'submasters.' These submasters can be programmed to control a single

Touring Systems - A touring system is generally a rack unit designed for easy of mobility, set up and repair to be taken on tour and can include lighting, audio and staging equipment. . Used . . Used . ...