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A common dual dimmer module used in stage lighting A dimmer. A dimmer is a device connected to a light fixture and used to lower the brightness of the light.By changing the voltage waveform applied to the lamp, it is possible to lower the intensity of the light output.
Most modern ballasts are now also equipped with a dimmer, which uses pulse-width modulation to dim the lamp up to 50%, or as much as one stop of light. Unlike a tungsten-based light, which has a negative color temperature shift with a drop in power, the mercury emission spectra takes over with a drop in power (approximately 200 K bluer at 50% ...
[33] [29] The takeover of the incandescent lamp would be inexorable. [36] [37] [29] From about 1908, motion picture studios were using the company's floor-stand arc lamps, which allowed for point-source lighting, including some of the first low-light effects; the shadow produced by the two pairs of carbon rods can be seen in some early films. [38]
A pair of electronic 2.4 kW dimmers for tungsten incandescent lamps. A dimmer is a device used to vary the average voltage applied to an instrument's lamp. The brightness of a lamp depends on its electric current, which in turn depends on the applied lamp voltage. When the applied voltage is decreased, a lamp's electric current will also ...
High-intensity discharge lamps (or HID lamps) are now common where a very bright light output is required, for example in large follow spots, HMI (hydrargyrum medium-arc iodide) floods, and modern automated fixtures. Because these types of lamps cannot be electrically dimmed, dimming is done by mechanical dousers or shutters that physically ...
The company subsequently incorporated as Vari-Lite Inc. [8] and struck distribution deals to introduce the product into international markets. [citation needed]The Series 200 system launched in 1987, featuring the Artisan Control Console and two new luminaires: the VL2—a direct descendant of the VL1—and the VL3, based on the VL-Zero.
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