Salt lamp

{{altmed}}
'''Salt lamps''' are blocks of salt with either electric lights or candles inside that [[Salt woo|are claimed to improve one's health]] by releasing negative ions into the air.<ref>[http://www.saltlamp.ca/research-salt-lamps.php How Do They Work?] Saltlamp.ca, GAMMA Salt Cristals [''sic''] Ltd. </ref> They don't do that, of course, and the only proven benefit to owning a Himalayan salt lamp is that it can be nice to look at.

=="Himalayan" salt==
Salt lamps are marketed as being made of {{wpl|Himalayan salt|"Himalayan" salt|,}} probably in order make them seem more [[New Age]]-y and [[spiritual]]. After all, Himalayan [[Crystal woo|crystals]] must be chock full of mystical healing [[Subtle energy|energy]], as opposed to those mundane [[Western medicine|Western]] sodium chloride rocks, right? Actually, the term Himalayan salt is a bit of a misnomer, as it refers to salt from the [[Pakistan]]i Khewra Salt Mine, which is nowhere near the Himalayas.<ref>[https://www.jcsp.org.pk/ArticleUpload/1249-5588-1-RV.pdf "Chemical Evaluation of Major Salt Deposits of Pakistan"] Qazi Muhammad Sharif; Mumtaz Hussain; Muhammad Tahir Hussain (December 2007). Viqar Uddin Ahmad; Muhammad Raza Shah, eds. ''Journal of the Chemical Society of Pakistan.'' Chemical Society of Pakistan. 29 (26): 570–571.</ref><ref>[https://web.archive.org/web/20041105093410/http://www.dailytimes.com.pk/default.asp?page=story_12-11-2003_pg5_11 Salt production target on track this year] ''Daily Times Pakistan''. 12 November 2003.</ref><ref>[https://www.1millionwomen.com.au/blog/6-reasons-end-your-love-affair-himalayan-rock-salt/ 6 Reasons to End Your Love Affair with Himalayan Rock Salt]. Trotta, Laura. ''One Million Women'', Blog. 8th Jun 2016.</ref>

==Negative ionic goodness==
The problem with the claim that these lamps release negative ions is that electric lights and candle flames aren't nearly hot enough to break apart the ionic bonds between sodium and chlorine.<ref name=hoho>[http://articles.latimes.com/2008/dec/15/health/he-skeptic15 Ho-ho Hokum?] Los Angeles Times, December 15, 2008, Chris Woolston.</ref> As one university [[physics]] professor puts it, "If that were true, we'd have chlorine gas coming out our salt shakers."<ref name=hoho/> That, and sprinkling salt onto fries and then eating them would blow our jaws off from metallic sodium touching our saliva, the resulting lye burning our throats on its way down. The electrostatic attraction between even two ions is so large that chloride cannot be released in significant amounts.<ref>{{wpa|lattice energy}} Such values are never directly measured, but determined by thermodynamics. The lattice energy for sodium chloride is 787 kJ/mol.</ref> The orange color that they emit is from the excitation of electrons to higher energy levels. They are orange because of impurities in the salt, especially iron oxide (rust).<ref>[http://web.archive.org/web/20110718201807/http://www.lgl.bayern.de/aktuell/presse_alt/detailansicht.htm?tid=16387 Alles nur Kochsalz &mdash; LGL nimmt 'Himalayasalz' genauer unter die Lupe] (11. August 2003 Nr. 38/03)</ref><ref>[http://science.howstuffworks.com/innovation/edible-innovations/salt2.htm How Salt Works: Table Salt and Sea Salt]</ref> If fire can't make these lamps release negative ions, it's not likely slightly warm electric lights could.

Perhaps these lamps don't ionize the sodium or chlorine in the salt, but the molecules in the air around the lamp. "Negative ions" have been a buzzword used by various [[woo]] machines for decades, and there do exist air ionization machines that can indeed negatively ionize air molecules. The only problem is, negatively ionized air molecules don't really cure ''anything''. (If you have a ''lot'' of ions in the air, we call it "lightning".) Whether salty air does anything is of course another thing entirely, but one would imagine ancient sailors wouldn't keep dying of everything if there were some secret magical healing quality to it.

==Practical Uses==
Salt Lamps make a good conversation piece and a half-decent night light so you don't step on your cat on your way to the bathroom at 2 AM.

The lamps are also useful as a salty popsicle, if for some reason you like salty popsicles.

They also tend to be a reddish-orangish colour, which means they emit less blue light than more whitish lamps (that is, they have a lower colour temperature, if you know what that means). So you may end up sleeping a little better than you would with a brighter, more whitish-coloured lamp. Of course, there are other ways of achieving that effect.

You might also be able to chip some shavings off it, if you ever run out of salt and need more.
That's about it.

==See also==
*[[Salt cave therapy]]

==References==
{{reflist|2|80%}}

[[Category:Alternative medicine]]
[[Category:Crystals]]
[[Category:Nature woo]]

Categories: Alternative medicine, Crystals, Nature woo