The stage light is the earliest developed, and followed is the film, television lights later. The early performances used natural light torches, oil lamps, candles and other lighting sources. 17th century, the framed stage appeared, stage lights developed from the non-controllable light source to the simple light able to control the light intensity and color. In 1804, there had new light and lamps of stage lighting by using the combustion of acetylene gas to heat quicklime to reach incandescent statue. 19th century, had adopted the stage lights of gas lamps, kerosene lamps and electric light, and appeared spotlight and astigmatism light (floodlight) in terms of lighting and lamps, and also centralized control the lightings scattered inside and outside of the stage, so that make the stage lighting gradually enter into the art lighting field. . 1960s, the stage lights have tended to serialization, systematic, and automation, and light with a full range of computer control, and extensive use of laser & voice effector.
Early film use incandescent lamps, carbon arc lamps and high-pressure mercury lamp as light source to take black and white films. In 1960s began using tungsten halogen lamp, with 3200K color temperature, CRI 99, to ensure the color reproduction of color film. Early 1970s, China invented the DC dysprosium, holmium lights, with 5500K color temperature, CRI above 80, and has no AC strobe, etc., to ensure the color reproduction of daylight color film and taking pictures interior.
TV lights are developed on the basis of the arena and movie lights, in the 1950s. Due to the higher and higher sensitivity of the image pickup tube, a the power of the TV lamp corresponding decreased. Especially the rapid development of small studio and CCTV, made special requirements for the TV lights, and then had lever control lights, electric lamps, etc.
Stage lights are made up from the light source film, optical components, mechanical components and electrical components. ① light. There have Incandescent, halogen and metal halide lamps and others. Their luminous lanes present as rectangular geometry of dot, strip or rectangle, with two kinds of color temperature, 3200K and 5500K, and color rendering index of 80 or more. ② The optical component. According to using requirements of the shape, imaging, and lighting of the lighting source body, constituting optical system by a reflector, a field lens (condenser lens), and objective lens. ③ mechanical components. There have the effects of containment and block light, heat, insulation and other effects, and to ensure a stable and reliable optical systems and play a variety of functions, including blow up and blow down the light beam angle, focus the ordinary lens or a zoom lens focusing, effect motor-mechanical transmission and the like. ④ electrical components. Including the voltage-stabilized source, light attachment (trigger, ballast, rheostat, etc.), dimmer and continuously variable electrical lines on effects of the drive motor controlled and so on.