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  2. Electrical ballast - Wikipedia

    en.wikipedia.org/wiki/Electrical_ballast

    Several American magnetic ballasts for fluorescent lamps. The top is a rapid start series autoregulator ballast for two 30–40 W lamps. The middle is a preheat reactor ballast for a single 30–40 W lamp while the bottom ballast is a simple inductor used with a 15 W preheat lamp. An American magnetic ballast for signs in an aluminum sign frame.

  3. Induction coil - Wikipedia

    en.wikipedia.org/wiki/Induction_coil

    Antique induction coil used in schools from around 1900, Bremerhaven, Germany. An induction coil or "spark coil" (archaically known as an inductorium or Ruhmkorff coil [1] after Heinrich Rühmkorff) is a type of transformer [2] [3] [4] used to produce high-voltage pulses from a low-voltage direct current (DC) supply.

  4. Dimmer - Wikipedia

    en.wikipedia.org/wiki/Dimmer

    A thyristor dimmer rack An electrical schematic for a typical SCR-based light dimmer Solid-state , or semiconductor , dimmers were introduced to solve some of these problems. Semiconductor dimmers switch on at an adjustable time (phase angle) after the start of each alternating-current half-cycle, thereby altering the voltage waveform applied ...

  5. Lighting control console - Wikipedia

    en.wikipedia.org/wiki/Lighting_control_console

    A lighting control console (also called a lightboard, lighting board, or lighting desk) is an electronic device used in theatrical lighting design to control multiple stage lights at once. They are used throughout the entertainment industry and are normally placed at the front of house (FOH) position or in a control booth .

  6. Holiday lighting technology - Wikipedia

    en.wikipedia.org/wiki/Holiday_lighting_technology

    An LED holiday light. Light-emitting diode (LED) holiday lights are quickly gaining popularity in many places due to their low energy usage, long lifetime, and associated low maintenance. Colored LEDs are far more efficient at producing light than their colored incandescent counterparts.

  7. Light-emitting diode - Wikipedia

    en.wikipedia.org/wiki/Light-emitting_diode

    One-color light is well suited for traffic lights and signals, exit signs, emergency vehicle lighting, ships' navigation lights, and LED-based Christmas lights Because of their long life, fast switching times, and visibility in broad daylight due to their high output and focus, LEDs have been used in automotive brake lights and turn signals.

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