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  2. Holiday lighting technology - Wikipedia

    en.wikipedia.org/wiki/Holiday_lighting_technology

    Battery-powered sets typically come in 10 or 12, and can use standard 2.5 to 3.5-volt bulbs because they run two batteries, totaling three volts or less. LEDs are becoming increasingly common as they greatly prolong battery life, but because they also last longer they are often soldered directly to the wires, making up for some of the increased ...

  3. 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 ...

  4. List of automotive light bulb types - Wikipedia

    en.wikipedia.org/wiki/List_of_automotive_light...

    12 V: 35 W PGJY19-1 USA H9 1 12 V: 65 W PGJ19-5 USA H9B 1 12 V: 65 W PGJY19-5 USA H10 1 12 V: 42 W PY20d USA ANSI â„– 9145 ECE nominal luminous flux: 850 lm ±15% H11 1 12 V: 55 W 24 V: 70 W PGJ19-2 USA ECE nominal luminous flux: 1,350 lm ±10% H11B 1 12 V: 55 W 24 V: 70 W PGJY19-2 USA H12 1 12 V: 53 W PZ20d USA ANSI â„– 9055

  5. LED lamp - Wikipedia

    en.wikipedia.org/wiki/LED_lamp

    A 230-volt LED filament lamp, with an E27 base. The filaments are visible as the eight yellow vertical lines. An assortment of LED lamps commercially available in 2010: floodlight fixtures (left), reading light (center), household lamps (center right and bottom), and low-power accent light (right) applications An 80W Chips on board (COB) LED module from an industrial light luminaire, thermally ...

  6. LED circuit - Wikipedia

    en.wikipedia.org/wiki/LED_circuit

    In CC drivers, the voltage changes while the current stays the same. CC drivers are used when the electrical load of the LED circuit is either unknown or fluctuates, for example, a lighting circuit where a variable number of LED lamp fixtures may be installed. As an LED heats up, its voltage drop decreases (band gap decrease [1]). This can ...

  7. Longest-lasting light bulbs - Wikipedia

    en.wikipedia.org/wiki/Longest-lasting_light_bulbs

    Each time the bulb is turned on and off, the filament is heated and cooled. This causes the material of the filament to expand and contract, in turn causing stress cracks to develop. The more the light is turned on and off, the larger these cracks grow, until eventually the filament breaks, thus causing the light to burn out.

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