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  2. List of automotive light bulb types - Wikipedia

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

    12V: ECE nominal luminous flux: 1,550 lm ±15% H3 1 6 V & 12 V: 55 W 24 V: 70 W PK22s USA, Japan 12V: ECE nominal luminous flux: 1,450 lm ±15% H4 2 6 V & 12 V: 60 / 55 W 24 V: 75 / 70 W P43t Japan Similar US bulb: HB2 (9003) 12V: ECE nominal luminous flux: 1,650 / 1,000 lm ±15% Available with P45t base to upgrade old headlamps designed for R2 ...

  3. H1 lamp - Wikipedia

    en.wikipedia.org/wiki/H1_Lamp

    Under ECE Regulation 37, which governs automotive filament lamps in most of the world, the H1 lamp's nominal rating is 55 W at 12 V, and its test rating is 68 W (maximum) and 1550 ± 15% lumens at 13.2 V. R37 also contains provisions for 6 V, 55 W and 24 V, 70 W H1 lamps. [1]

  4. Bi-pin lamp base - Wikipedia

    en.wikipedia.org/wiki/Bi-pin_lamp_base

    The suffix after the G indicates the pin spread; the G dates to the use of Glass for the original bulbs. GU usually also indicates that the lamp provides a mechanism for physical support by the luminaire: in some cases, each pin has a short section of larger diameter at the end (sometimes described as a "peg" rather than a "pin" [2]); the socket allows the bulb to lock into place by twisting ...

  5. Wedge base - Wikipedia

    en.wikipedia.org/wiki/Wedge_base

    Alternatively, a numerical code is sometimes used, such as 921 for a W16W/T15 bulb. In Europe, bulbs using wedge base connectors are often referred to by the designations the World Forum for Harmonization of Vehicle Regulations has assigned to them, like P27/7W for W2.5x16q when used as a combined 27 and 7 watt light bulb intended for position ...

  6. Luminous efficacy - Wikipedia

    en.wikipedia.org/wiki/Luminous_efficacy

    Sources that depend on thermal emission from a solid filament, such as incandescent light bulbs, tend to have low overall efficacy because, as explained by Donald L. Klipstein, "An ideal thermal radiator produces visible light most efficiently at temperatures around 6300 °C (6600 K or 11,500 °F). Even at this high temperature, a lot of the ...

  7. Fluorescent-lamp formats - Wikipedia

    en.wikipedia.org/wiki/Fluorescent-lamp_formats

    These lamps are used for fluorescence effects where less visible light is ideal. 09 N/A Sun-tanning lamps: These lamps produce wide or narrow band UV-B radiation 10 BL Black-Light lamps: Black light lamps give off long-wave UV-A radiation of around 350-400 nm. They are often used to attract insects to traps.

  8. LED circuit - Wikipedia

    en.wikipedia.org/wiki/LED_circuit

    Simple LED (Light Emitting Diode) circuit diagram. In electronics, an LED circuit or LED driver is an electrical circuit used to power a light-emitting diode (LED). The circuit must provide sufficient current to light the LED at the required brightness, but must limit the current to prevent damaging the LED.

  9. Incandescent light bulb - Wikipedia

    en.wikipedia.org/wiki/Incandescent_light_bulb

    Less than 5% of the power consumed by a typical incandescent light bulb is converted into visible light, with most of the rest being emitted as invisible infrared radiation. [1] [78] Light bulbs are rated by their luminous efficacy, which is the ratio of the amount of visible light emitted (luminous flux) to the electrical power consumed. [79]

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