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  2. Electricity on Shabbat - Wikipedia

    en.wikipedia.org/wiki/Electricity_on_Shabbat

    Electricity generated on Shabbat is needed for the day-to-day operations of hospitals, first aid centers, outpatients who require medical care in their homes, and climate control for people who need it, a refrigerator for a baby or the elderly who must eat refrigerated food, and possibly street lights which help prevent road accidents.

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  4. Synchronization (alternating current) - Wikipedia

    en.wikipedia.org/wiki/Synchronization...

    As the generator speed changes, the lights will flicker at the beat frequency proportional to the difference between generator frequency and system frequency. When the voltage at the generator is opposite to the system voltage (either ahead or behind in phase), the lamps will be bright. When the voltage at the generator matches the system ...

  5. Emergency light - Wikipedia

    en.wikipedia.org/wiki/Emergency_light

    Every model, therefore, requires some sort of a battery or generator system that could provide electricity to the lights during a blackout. The earliest models were incandescent light bulbs which could dimly light an area during a blackout and perhaps provide enough light to solve the power problem or evacuate the building. It was quickly ...

  6. Induction lamp - Wikipedia

    en.wikipedia.org/wiki/Induction_lamp

    The induction lamp, electrodeless lamp, or electrodeless induction lamp is a gas-discharge lamp in which an electric or magnetic field transfers the power required to generate light from outside the lamp envelope to the gas inside.

  7. Electric light - Wikipedia

    en.wikipedia.org/wiki/Electric_light

    An electric light, lamp, or light bulb is an electrical component that produces light.It is the most common form of artificial lighting.Lamps usually have a base made of ceramic, metal, glass, or plastic which secures the lamp in the socket of a light fixture, which is often called a "lamp" as well.