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  2. Twinkle bulb - Wikipedia

    en.wikipedia.org/wiki/Twinkle_bulb

    The advent of miniature lights found the adaptation of twinkle bulbs as flasher bulbs, which interrupt the entire series circuit of anywhere from 10 to 50 bulbs when powered from 120-volt mains electricity (in North America). These are easily recognizable by their red tips on an otherwise unpainted clear white bulb, and are available in the ...

  3. Holiday lighting technology - Wikipedia

    en.wikipedia.org/wiki/Holiday_lighting_technology

    These lights usually come in sets of 140 or 150. This is because to give the chasing effect, bulbs must be arranged in four circuits of 35 (sets of 140) or three circuits of 50 (sets of 150). These light sets use even less power than a regular set of 150, because the lights are not always on, and therefore the bulbs also do not get as hot.

  4. Mechanically powered flashlight - Wikipedia

    en.wikipedia.org/wiki/Mechanically_powered...

    These flashlights can also be distinguished by the technique used to store the energy: a spring, [1] a flywheel, a battery or a capacitor. Since they are always ready for use, mechanically powered flashlights are often kept as emergency lights in case of power outages or other emergencies. They are also kept at vacation homes, cabins, and other ...

  5. Wireless security camera - Wikipedia

    en.wikipedia.org/wiki/Wireless_security_camera

    However, some wireless security cameras are battery-powered, making the cameras truly wireless from top to bottom. Wireless cameras are proving very popular among modern security consumers due to their low installation costs (there is no need to run expensive video extension cables) and flexible mounting options; wireless cameras can be mounted ...

  6. Wireless light switch - Wikipedia

    en.wikipedia.org/wiki/Wireless_light_switch

    Dimmer light switch with RF-based remote control [1] A wireless light switch is a light switch that commands a light or home appliance to turn itself off or on, instead of interrupting the power line going to the light fixture. There are different ways to communicate between the switch and the fixture: [2]

  7. Flicker (light) - Wikipedia

    en.wikipedia.org/wiki/Flicker_(light)

    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.

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