Editing Electric light (section)

== Uses ==
[[File:Gluehlampe 01 KMJ.jpg|upright=0.75|thumb|A clear glass 60 W light bulb]]
The total amount of artificial light (especially from [[street light]]) is sufficient for cities to be easily visible at night from the air, and from space. External lighting grew at a rate of 3–6 percent for the later half of the 20th century and is the major source of [[light pollution]]<ref name="auto">{{Cite web |date=2017-11-22 |title=Artificial lights are eating away at dark nights — and that's not a good thing |url=https://www.latimes.com/science/sciencenow/la-sci-sn-earth-artificial-light-night-darkness-20171122-story.html |access-date=2022-10-07 |website=Los Angeles Times |language=en-US}}</ref> that burdens [[astronomer]]s<ref>{{Cite web |title=Light Pollution |url=https://sites.astro.caltech.edu/palomar/community/lightpollution.html |access-date=2022-10-07 |website=sites.astro.caltech.edu}}</ref> and others with 80% of the world's population living in areas with night time light pollution.<ref>{{Cite journal |last1=Falchi |first1=Fabio |last2=Cinzano |first2=Pierantonio |last3=Duriscoe |first3=Dan |last4=Kyba |first4=Christopher C. M. |last5=Elvidge |first5=Christopher D. |last6=Baugh |first6=Kimberly |last7=Portnov |first7=Boris A. |last8=Rybnikova |first8=Nataliya A. |last9=Furgoni |first9=Riccardo |date=2016-06-10 |title=The new world atlas of artificial night sky brightness |journal=Science Advances |volume=2 |issue=6 |pages=e1600377 |doi=10.1126/sciadv.1600377 |issn=2375-2548 |pmc=4928945 |pmid=27386582|arxiv=1609.01041 |bibcode=2016SciA....2E0377F }}</ref> Light pollution has been shown to have a negative effect on some wildlife.<ref name="auto" /><ref>{{Cite journal |last=Pain |first=Stephanie |date=2018-03-23 |title=There goes the night |url=https://knowablemagazine.org/article/living-world/2018/there-goes-night |journal=Knowable Magazine |language=en |doi=10.1146/knowable-032218-043601|doi-access=free }}</ref>

Electric lamps can be used as heat sources, for example in [[Incubator (egg)|incubators]], as [[infrared lamp]]s in [[fast food]] restaurants and toys such as the Kenner [[Easy-Bake Oven]].<ref>{{Cite web |title=Easy-Bake Oven |url=https://www.museumofplay.org/toys/easy-bake-oven/ |access-date=2022-10-07 |website=The Strong National Museum of Play |language=en-US}}</ref>

Lamps can also be used for [[light therapy]] to deal with such issues as [[vitamin D deficiency]],<ref>{{Cite journal |last1=Lee |first1=Ernest |last2=Koo |first2=John |last3=Berger |first3=Tim |date=May 2005 |title=UVB phototherapy and skin cancer risk: a review of the literature |url=https://onlinelibrary.wiley.com/doi/10.1111/j.1365-4632.2004.02186.x |journal=International Journal of Dermatology |language=en |volume=44 |issue=5 |pages=355–360 |doi=10.1111/j.1365-4632.2004.02186.x |pmid=15869531 |s2cid=11332443 |issn=0011-9059}}</ref> skin conditions such as [[acne]]<ref>{{Cite journal |last1=Pei |first1=Susan |last2=Inamadar |first2=Arun C. |last3=Adya |first3=Keshavmurthy A. |last4=Tsoukas |first4=Maria M. |date=May 2015 |title=Light-based therapies in acne treatment |journal=Indian Dermatology Online Journal |language=en-US |volume=6 |issue=3 |pages=145–157 |doi=10.4103/2229-5178.156379 |issn=2229-5178 |pmc=4439741 |pmid=26009707 |doi-access=free }}</ref><ref>{{Cite journal |last1=Hamilton |first1=F.L. |last2=Car |first2=J. |last3=Lyons |first3=C. |last4=Car |first4=M. |last5=Layton |first5=A. |last6=Majeed |first6=A. |date=June 2009 |title=Laser and other light therapies for the treatment of acne vulgaris: systematic review |url=https://onlinelibrary.wiley.com/doi/10.1111/j.1365-2133.2009.09047.x |journal=British Journal of Dermatology |language=en |volume=160 |issue=6 |pages=1273–1285 |doi=10.1111/j.1365-2133.2009.09047.x|pmid=19239470 |s2cid=6902995 }}</ref> and [[dermatitis]],<ref>{{Cite journal |last1=Patrizi |first1=Annalisa |last2=Raone |first2=Beatrice |last3=Ravaioli |first3=Giulia Maria |date=2015-10-05 |title=Management of atopic dermatitis: safety and efficacy of phototherapy |journal=Clinical, Cosmetic and Investigational Dermatology |language=English |volume=8 |pages=511–520 |doi=10.2147/CCID.S87987 |pmc=4599569 |pmid=26491366 |doi-access=free }}</ref> [[skin cancer]]s,<ref>{{Cite journal |last1=Morton |first1=C.A. |last2=Brown |first2=S.B. |last3=Collins |first3=S. |last4=Ibbotson |first4=S. |last5=Jenkinson |first5=H. |last6=Kurwa |first6=H. |last7=Langmack |first7=K. |last8=Mckenna |first8=K. |last9=Moseley |first9=H. |last10=Pearse |first10=A.D. |last11=Stringer |first11=M. |last12=Taylor |first12=D.K. |last13=Wong |first13=G. |last14=Rhodes |first14=L.E. |date=April 2002 |title=Guidelines for topical photodynamic therapy: report of a workshop of the British Photodermatology Group |url=http://doi.wiley.com/10.1046/j.1365-2133.2002.04719.x |journal=British Journal of Dermatology |language=en |volume=146 |issue=4 |pages=552–567 |doi=10.1046/j.1365-2133.2002.04719.x |pmid=11966684 |s2cid=7137209 |issn=0007-0963}}</ref> and [[seasonal affective disorder]].<ref>{{Cite journal |last1=Thompson |first1=C. |last2=Stinson |first2=D. |last3=Smith |first3=A. |date=1990-09-22 |title=Seasonal affective disorder and season-dependent abnormalities of melatonin suppression by light |url=https://www.thelancet.com/journals/lancet/article/PII0140-6736(90)92202-S/abstract |journal=The Lancet |language=English |volume=336 |issue=8717 |pages=703–706 |doi=10.1016/0140-6736(90)92202-S |issn=0140-6736 |pmid=1975891|s2cid=34280446 }}</ref><ref>{{Cite journal |last1=Danilenko |first1=K. V. |last2=Ivanova |first2=I. A. |date=2015-07-15 |title=Dawn simulation vs. bright light in seasonal affective disorder: Treatment effects and subjective preference |url=https://www.sciencedirect.com/science/article/pii/S0165032715001949 |journal=Journal of Affective Disorders |language=en |volume=180 |pages=87–89 |doi=10.1016/j.jad.2015.03.055 |pmid=25885065 |issn=0165-0327}}</ref><ref>{{Cite journal |last=Sanassi |first=Lorraine A. |date=February 2014 |title=Seasonal affective disorder: Is there light at the end of the tunnel? |journal=JAAPA |language=en-US |volume=27 |issue=2 |pages=18–22 |doi=10.1097/01.JAA.0000442698.03223.f3 |pmid=24394440 |s2cid=45234549 |issn=1547-1896|doi-access=free }}</ref> Lamps which emit a specific frequency of blue light are also used to treat [[neonatal jaundice]]<ref>{{Cite journal |last1=Cremer |first1=R. J. |last2=Perryman |first2=P. W. |last3=Richards |first3=D. H. |date=1958-05-24 |title=Influence of Light on the Hyperbilirubinæmia of Infants |url=https://www.thelancet.com/journals/lancet/article/PIIS0140-6736(58)91849-X/abstract |journal=The Lancet |language=English |volume=271 |issue=7030 |pages=1094–1097 |doi=10.1016/S0140-6736(58)91849-X |pmid=13550936 |issn=0140-6736}}</ref> with the treatment which was initially undertaken in hospitals being able to be conducted at home.<ref>{{Cite journal |last1=Anderson |first1=Candice Megan |last2=Kandasamy |first2=Yogavijayan |last3=Kilcullen |first3=Meegan |date=2022-10-01 |title=The efficacy of home phototherapy for physiological and non-physiological neonatal jaundice: A systematic review |url=https://www.sciencedirect.com/science/article/pii/S1355184121001381 |journal=Journal of Neonatal Nursing |language=en |volume=28 |issue=5 |pages=312–326 |doi=10.1016/j.jnn.2021.08.010 |s2cid=238646014 |issn=1355-1841}}</ref><ref>{{Cite journal |last1=Pettersson |first1=M. |last2=Eriksson |first2=M. |last3=Albinsson |first3=E. |last4=Ohlin |first4=A. |date=2021-05-01 |title=Home phototherapy for hyperbilirubinemia in term neonates—an unblinded multicentre randomized controlled trial |url=https://doi.org/10.1007/s00431-021-03932-4 |journal=European Journal of Pediatrics |language=en |volume=180 |issue=5 |pages=1603–1610 |doi=10.1007/s00431-021-03932-4 |issn=1432-1076 |pmc=8032579 |pmid=33469713}}</ref>

Electric lamps can also be used as a [[grow light]] to aid in plant growth<ref>{{Cite web|date=2021-08-27|title=How to Choose the Proper Grow Light for Your Indoor Garden|url=https://primalgrowgear.com/2021/08/how-to-choose-the-proper-grow-light-for-your-indoor-garden/|url-status=live|archive-date=2022-01-05|archive-url=https://web.archive.org/web/20220105060808/https://primalgrowgear.com/2021/08/how-to-choose-the-proper-grow-light-for-your-indoor-garden/|access-date=2022-01-05|website=primalgrowgear.com|language=en-US}}</ref> especially in indoor [[hydroponics]] and [[aquatic plants]] with recent research into the most effective types of light for plant growth.<ref>{{Cite journal |last1=Terashima |first1=Ichiro |last2=Fujita |first2=Takashi |last3=Inoue |first3=Takeshi |last4=Chow |first4=Wah Soon |last5=Oguchi |first5=Riichi |date=April 2009 |title=Green Light Drives Leaf Photosynthesis More Efficiently than Red Light in Strong White Light: Revisiting the Enigmatic Question of Why Leaves are Green |journal=Plant and Cell Physiology |language=en |volume=50 |issue=4 |pages=684–697 |doi=10.1093/pcp/pcp034 |pmid=19246458 |issn=1471-9053|doi-access=free }}</ref>

Due to their nonlinear resistance characteristics, tungsten filament lamps have long been used as fast-acting [[thermistor]]s in electronic circuits. Popular uses have included:
* Stabilization of sine wave oscillators
* Protection of [[loudspeaker|tweeters]] in [[loudspeaker enclosure]]s; excess current that is too high for the tweeter illuminates the light rather than destroying the tweeter.
* [[Automatic gain control|Automatic volume control]] in telephones