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In visual perception, flicker is a human-visible change in luminance of an illuminated surface or light source which can be due to fluctuations of the light source itself, or due to external causes such as due to rapid fluctuations in the voltage of the power supply (power-line flicker) or incompatibility with an external dimmer.
Building codes throughout the United States prohibit residential ceiling fans from being mounted with the blades closer than seven feet from the floor; [22] this sometimes proves, however, to not be high enough. If a ceiling fan is turned on and a person fully extends his or her arms into the air, as sometimes happens during normal tasks such ...
A High-volume low-speed fan. A high-volume low-speed (HVLS) fan is a type of mechanical fan greater than 7 feet (2.1 m) in diameter. [1] HVLS fans are generally ceiling fans although some are pole mounted. HVLS fans move slowly and distribute large amounts of air at low rotational speed– hence the name "high volume, low speed."
Light-Minder, which would turn the fan's light kit off two hours after being turned on; Safe-Exit, which gave the user 30 seconds to exit the room while the fan's light kit gradually dimmed to off; Fan-Minder, which was intended to be used as the user slept to gradually lower the fan speed as the room temperature fell during the night.
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.
To dim, verb that means to lower the brightness of light; Dim, a European rhinoceros beetle in the 1998 Disney/Pixar animated film A Bug's Life "DiM", a 1998 episode of Dexter's Laboratory; Dim, the fourth studio album by Japanese rock band The Gazette; The abbreviation dim may refer to:
The ceiling projector or cloud searchlight is used to measure the height of the base of clouds (called the ceiling) above the ground. It is used in conjunction with an alidade , usually positioned 1000 ft (300 m) away and wherever possible set at the same level.
At Broadway theatres in New York City, deaths of major figures in the world of theatre are often acknowledged by dimming the lights on the marquees.It is a coordinated tribute which usually lasts for one minute, shortly before the start of the evening performances.
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