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Color - Color temperature is measured in kelvins, and gel colors are organized by several different systems maintained by the color manufacturing companies. The apparent color of a light is determined largel. Used . y by the gel color given it, but also in part by the power level the lamp is being run at and the color of material is it to light. As the percentage of full power a lamp is being run at drop. Used . s, the tungsten filament in the bulb glows orange instead of more nearly white. This is known as amber drift or amber shift. Thus a 1000-watt instrument at 50% will appear far more orange than a 500-watt instr

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 . 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 'stippled' on. Used . 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 ...

Ground Support - In Staging, Ground Support applies to any electrical or mechanical device to aid a rigging crew in lifting and placing staging gear, lighting or audio gear into place.. Used . . Used . ...

Working Lights - Stage or auditorium lights, independent of the main theatrical system, used during rehearsals and while the crew sets up or breaks down the stage. Also, low wattage lights used to illuminate offstage. Used . obstacles and props tables unseen by the audience.. Used . ...

Color gel - Color gel is a translucent or transparent coloured material that is used in theatre to colour light. Modern gels are usually made of polycarbonate or polyester, but the name arose from the gelatin ori. Used . ginally used. See gel (theater).

Gels are also used in photography and cinematography for the purpose of color correction, and in this capacity are usually called color filters.<. Used . br />
Similar colors may vary between different companies' formulations - for instance, they all have a color named 'bastard amber', yet Rosco's bastard amber is different from Lee's is different from G...