BACKGROUND LIGHTING [Film Technology]

BACKGROUND LIGHTING 
[Film Technology]

To illuminate set, to create atmosphere. Light illuminating the background alone. Large scenic backgrounds such as cyclorama and back cloths (back drops) can be lit in various ways, depending on the effect want to achieve. Fresnel spots can provide areas of light of reasonably controllable shape, generalized blobs, or streaks and simple shadow pattern or light patterns. Flood lights can wash an area of background with soft light(white soft light or coloured[colour soft light]). Ellipsoidal spots can produce fairly localized precise light pattern formation. A more controlled method of lighting background is needed and several special units (CYC lights) have evolved for the purpose. The simplest is the strip light (border light). In a more sophisticate design, tubular line filaments are offset with in their curved sheet reflector so that the light emerges in an elongated lob. The light from a series of units, blends with that from a row on the ground. Where a shaded CYC is required, a row of ground troughs alone is used. Colour filters can be fitted over them, either to obtain a continuous single-colour effect or by different colours in alternate lamps (e.g. blue filter, amber filter) these can be controlled to produce colour mixtures[mixed colour light]. The most advanced cyclorama lighting units have specially shaped reflectors that enable to light a background evenly with hung light units alone critically positioned, they produce flat over all illumination when located 10 ft (3m) from a cyclorama at 8 ft (2.5m) intervals. Typical bulbs are 625/1000/1250W per individual fitting. In single twin, or four light forms, they can be used with white, red, green or blue units to provide colour light mixing.

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