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2. Metal-halide lamp - Wikipedia

   en.wikipedia.org/wiki/Metal-halide_lamp

   A metal-halide lamp is an electrical lamp that produces light by an electric arc through a gaseous mixture of vaporized mercury and metal halides [1][2] (compounds of metals with bromine or iodine). It is a type of high-intensity discharge (HID) gas discharge lamp. [1] Developed in the 1960s, they are similar to mercury vapor lamps, [1] but ...

3. Centennial Light - Wikipedia

   en.wikipedia.org/wiki/Centennial_Light

   The Centennial Light is an incandescent light bulb recognized as the oldest known continuously operating light bulb. It was first illuminated in 1901, and has only been turned off a few brief times since. It is located at 4550 East Avenue, Livermore, California, and is open to public viewing. [1] Due to its longevity, the bulb has been noted by ...

4. Sodium-vapor lamp - Wikipedia

   en.wikipedia.org/wiki/Sodium-vapor_lamp

   A sodium-vapor lamp is a gas-discharge lamp that uses sodium in an excited state to produce light at a characteristic wavelength near 589 nm. Two varieties of such lamps exist: low pressure and high pressure. Low-pressure sodium lamps are highly efficient electrical light sources, but their yellow light restricts applications to outdoor ...

5. 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 ...

6. List of automotive light bulb types - Wikipedia

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

   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 bulb. H7.

7. Incandescent light bulb - Wikipedia

   en.wikipedia.org/wiki/Incandescent_light_bulb

   Historians Robert Friedel and Paul Israel list inventors of incandescent lamps prior to Joseph Swan and Thomas Edison of General Electric. [4]: 91–93 They conclude that Edison's version was the first practical implementation, able to outstrip the others because of a combination of four factors: an effective incandescent material; a vacuum higher than other implementations which was achieved ...