R - Lighting, Audio, Staging & Video

Fresnel - Fresnels are typically 8-, 6- or 4-inch, referring to the diameter of the lens. This light is named after Augustin-Jean Fresnel who invented the distinctive Fresnel lens which has a 'stepped' appearan. Used Lighting. ce instead of the 'full' or 'smooth' appearance of other lenses. The stepped nature of the lens causes a corresponding pattern of circles of light, so Fresnel lenses are usually 'stip. Used Lighting. pled' on the flat side. This pattern of small bumps helps to break up the light passing into the lens to smooth out its eventual pattern.

Fresnels use a spherical reflector, with the filament of the bulb ...

Amphitheatre - The name amphitheatre (alternatively amphitheater) is given to a public building of the Classical period (being particularly associated with ancient Rome) which was used for spectator sports, games an. Used Lighting. d displays.

Apart from function, the important outward distinction between an amphitheatre and a theatre is that an amphitheatre is round or oval in shape (whereas a clas. Used Lighting. sical theatre was semi-circular). However, an amphitheatre differs from a circus, which was used for racing and looked more like a very long, narrow horse shoe.

The best-known amphitheatre in the world is...

Intensity - Measured in both lux and lumens. For any given luminaire (lighting instrument or fixture), this depends upon the power of the bulb, the design of the instrument (and its corresponding efficiency), the. Used Lighting. presence or absence of color gels or gobos, distance from the area to be lit, the color and subtance to be lit, and the neuro-optics of the total scene (that is, the relative contras. Used Lighting. ts to other regions of illumination). ...

Bulbs - A Bulb or light bulb is a source of artificial light. There are many different kinds of bulbs including High Intensity Discharge or HIDs, Halogen, Fluorescent and Light Emitting Diodes, but the most . Used Lighting. common is the incandescence that works by the release of electromagnetic radiation. . Used Lighting. ...

Strip Light - Strip lights, also known as Cyclorama (Cyc) lights are long housings typically containing multiple lamps arranged along the length of the instrument and emitting light perpendicular to its length. Lam. Used Lighting. ps are often covered with individual gels of multiple c . Used Lighting. ...