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  2. LED filament - Wikipedia

    en.wikipedia.org/wiki/LED_filament

    A 230-volt LED filament light bulb, with a B22 base. The filaments are visible as the four yellow vertical lines. A LED filament light bulb is a LED lamp which is designed to resemble a traditional incandescent light bulb with visible filaments for aesthetic and light distribution purposes, but with the high efficiency of light-emitting diodes (LEDs).

  3. 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 ...

  4. 3-way lamp - Wikipedia

    en.wikipedia.org/wiki/3-way_lamp

    One common 3-way incandescent bulb is the 50/100/150 W. It has a low-power 50 W filament and a medium-power 100 W filament. When they are both energized at the same time, 150 W of power is delivered, and a high level of light is produced. Usually screw-base 3-way bulbs fit into regular Type A sockets (E26D after ISO 60061-1:2014). Larger 3-way ...

  5. Candela - Wikipedia

    en.wikipedia.org/wiki/Candela

    A 25 W compact fluorescent light bulb puts out around 1700 lumens; if that light is radiated equally in all directions (i.e. over 4 π steradians), it will have an intensity of = / = . Focused into a 20° beam (0.095 steradians), the same light bulb would have an intensity of around 18,000 cd or 18 kcd within the beam.

  6. Luminous efficacy - Wikipedia

    en.wikipedia.org/wiki/Luminous_efficacy

    Luminous efficacy can be normalized by the maximum possible luminous efficacy to a dimensionless quantity called luminous efficiency.The distinction between efficacy and efficiency is not always carefully maintained in published sources, so it is not uncommon to see "efficiencies" expressed in lumens per watt, or "efficacies" expressed as a percentage.

  7. List of automotive light bulb types - Wikipedia

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

    12 V: 24 W Red PWY24W WP3.3×14.5-4 1 12 V: 24 W Amber, ANSI № 7450 P27W W2.5×16d 1 12 V: 27 W ANSI № 3156 P27/7W W2.5×16q 2 12 V: 27 / 7 W ANSI № 3157 PR27/7W WU2.5x16 2 12 V: 27 / 7 W Red PY27/7W WX2.5x16q 2 12 V: 27 / 7 W Amber ANSI № 3757A R5W BA15s 1 6 V, 12 V, 24 V: 5 W Old designation: R19/5 RR5W BAW15s 1 12 V & 24 V: 5 W Red R10W

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