Edison light bulb

Edison light bulbs, retroactively referred to as antique light bulbs or vintage light bulbs, refer to carbon- or early tungsten-filament incandescent lamps, or modern bulbs that reproduce their appearance. Most of the bulbs in circulation are reproductions of the wound filament bulbs made popular by Edison Electric Light Company at the turn of the 20th century. They are easily identified by the long and complicated windings of their internal filaments, and by the very warm-yellow glow of the light they produce (many of the bulbs emit light at a color temperature of 2200–2400K).

History

 
Original carbon-filament bulb from Thomas Edison's shop in Menlo Park

Light bulbs with a carbon filament were first demonstrated by Edison in October 1879.[1][2] These carbon filament bulbs, the first electric light bulbs, became available commercially that same year.[3] In 1904 a tungsten filament was invented by Austro-Hungarians Alexander Just and Franjo Hanaman,[4] and was more efficient and longer-lasting than the carbonized bamboo filament used previously.[5] The introduction of a neutral gas to the glass envelope (or bulb) also helped to improve the lifespan and brightness of the bulb.[5] To produce enough light, these lamps required the use of extremely long filaments, which remained so until the development of more efficiently wound tungsten filaments.

Resurgence

 
A glowing vintage light bulb of "ST" shape

While the intricate filament design never fully left, innovations in energy efficiency outpaced the highly inefficient design quickly. Still, 51 years after more efficient designs had come into play, "Edison-style" or vintage lights saw a resurgence in many businesses and homes wanting atmospheric lighting or vintage themes.[6]

In the 1980s, after watching a salvage operation, Bob Rosenzweig started the reproduction and selling of his faux-antique bulbs.[6] These vintage-style light bulb reproductions were sold mostly to collectors and prop houses, and continued until the turn of the 21st century when new regulations banned low-efficiency lighting in many countries. However, while domestic lighting shifted toward more efficient compact fluorescent lamps and LED lights, demand for vintage bulbs likewise increased.[6] But passed as "specialty lighting", Edison-style incandescent lamps are exempted from the ban in most places.[citation needed]

More contemporary "Edison light bulbs" are designed to replicate the same light color and bulb shape of the original, but offer a more energy-efficient version to Rosenzweig's popular vintage reproduction bulbs (modern tungsten coils are already more efficient).[5][7][8] These bulbs maintain the same "exposed" look to further preserve the vintage reproduction style,[9] and often employ the "ST" long-pear bulb shape for the same reason. LED bulbs, including LED retro types, are much more energy-efficient than any incandescent lighting.[10]

In the 1960s, US inventor Robert (Bob) Kyp patented a similar in appearance but flickering "electric flame" light bulb under the name Balafire[11] as well as radiometers. His flicker bulb was used in a 7-Up commercial,[12] and the company he ran since 1964, Kyp-Go, is currently the only US manufacturer of carbon-filament bulbs.[13]

References

  1. ^ "Lighting A Revolution: Joseph W. Swan". americanhistory.si.edu. Retrieved 26 April 2019.
  2. ^ "Thomas Edison, Joseph Swan and The Real Deal Behind the Light Bulb". CIO US. 15 August 2001. Retrieved 26 April 2019.
  3. ^ "Incandescent electric lamp with 'candlestick' cap, c.1879". Science Museum (London). Retrieved 26 April 2019.
  4. ^ Dragana Nikšić (2 July 2017). "Franjo Hanaman, Inventor of World's First Commercially Viable Light Bulb". Total Croatia News. Retrieved 27 April 2019.
  5. ^ a b c Matulka, Rebecca. "The History of the Light Bulb". Energy.gov. U.S. Department of Energy. Retrieved 17 March 2015.
  6. ^ a b c Cardwell, Diane. "When Out to Dinner, Don't Count the Watts". The New York Times. Retrieved 17 March 2015.
  7. ^ Wells, Quentin (2012), Smart Grid Home, p. 163, ISBN 978-1111318512, retrieved 8 November 2012
  8. ^ "60 Watt – Edison Bulb – 5.2 in. Length – Vintage Light Bulb". 1000bulbs. Archived from the original on 6 September 2017. Retrieved 6 September 2017.
  9. ^ Neilson, Laura. "Hey, Restaurant Designers: There Are Now Edison-Style LED Light Bulbs". www.foodrepublic.com. Food Republic. Retrieved 17 March 2015.
  10. ^ "Classic LED filament lamps for decorative lighting". Philips Lighting. Retrieved September 5, 2017.
  11. ^ Scientific demo with the Balafire Flicker Bulb (video)
  12. ^ 7-Up Commercial with the Balafire Flicker Bulb
  13. ^ Kyp-Go Web site (discontinued, archived)