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A high-pressure sodium street light in Toronto A high-pressure sodium-vapor lamp An HPS lamp that isn't entirely off. A sodium-vapor lamp is a gas-discharge lamp that uses sodium in an excited state to produce light at a characteristic wavelength near 589 nm. Two varieties of such lamps exist: low pressure, and high pressure.
A set of lighting cues are prepared so that the lighting operator can control the lights in step with the performance; complex theatre lighting systems use computer control of lighting instruments. Motion picture and television production use many of the same tools and methods of stage lighting.
Strip lights, also known as cyclorama or cyc lights (thus named because they are effective for lighting the cyclorama, a curtain at the back of the stage), border lights, and codas (by the brand name), are long housings typically containing multiple lamps arranged along the length of the instrument and emitting light perpendicular to its length.
The lamp consisted of a Geissler tube that was excited by a battery-powered Ruhmkorff induction coil; an early transformer capable of converting DC currents of low voltage into rapid high-voltage pulses. Initially the lamp generated white light by using a Geissler tube filled with carbon dioxide. However, the carbon dioxide tended to break down.
The DV Rebel's Guide: An All-Digital Approach to Making Killer Action Movies on the Cheap is a non-fiction book and filmmaking handbook written by Stu Maschwitz for Peachpit Press. It was his first book, and has been called "a must-read for any and all filmmakers." [1] MircroFilmmaker Magazine named it an "industry icon." [2]
A strong light source, often a high-intensity discharge lamp with a high colour temperature. A lens which can be manually focused. A manual device to change the intensity of the beam, especially when an HID source which can not be electronically dimmed, is used. An "iris" to adjust the size of the spot/angle of the beam.
The eight-day holiday of Hanukkah, also known as the Festival of Lights, is celebrated by lighting a special Hanukkiyah each night to commemorate the rededication of the Temple in Jerusalem. [ 45 ] A memorial candle is lit on the Yahrtzeit , or anniversary of the death of a loved one according to the Hebrew calendar .