Editing Ultraviolet (section)

====Herpetology====
[[Reptile]]s need UVB for biosynthesis of vitamin D, and other metabolic processes.<ref>{{Cite journal |last1=Diehl |first1=J. J. E. |last2=Baines |first2=F. M. |last3=Heijboer |first3=A. C. |last4=van Leeuwen |first4=J. P. |last5=Kik |first5=M. |last6=Hendriks |first6=W. H. |last7=Oonincx |first7=D. G. A. B. |date=February 2018 |title=A comparison of UVb compact lamps in enabling cutaneous vitamin D synthesis in growing bearded dragons |journal=Journal of Animal Physiology and Animal Nutrition |language=en |volume=102 |issue=1 |pages=308–316 |doi=10.1111/jpn.12728 |pmid=28452197 |s2cid=30124686 |doi-access=free |url=https://dspace.library.uu.nl/bitstream/handle/1874/360841/Diehl_et_al_2018_Journal_of_Animal_Physiology_and_Animal_Nutrition_1_.pdf?sequence=1&isAllowed=y }}</ref> Specifically [[cholecalciferol]] (vitamin D3), which is needed for basic cellular / neural functioning as well as the utilization of calcium for bone and egg production.{{Citation needed|date=April 2022}} The UVA wavelength is also visible to many reptiles and might play a significant role in their ability survive in the wild as well as in visual communication between individuals.{{Citation needed|date=April 2022}} Therefore, in a typical reptile enclosure, a fluorescent UV a/b source (at the proper strength / spectrum for the species), must be available for many{{Which|date=April 2022}} captive species to survive. Simple supplementation with [[cholecalciferol]] (Vitamin D3) will not be enough as there is a complete biosynthetic pathway{{Which|date=May 2022}} that is "leapfrogged" (risks of possible overdoses), the intermediate molecules and metabolites{{Which|date=April 2022}} also play important functions in the animals health.{{Citation needed|date=April 2022}} Natural sunlight in the right levels is always going to be superior to artificial sources, but this might not be possible for keepers in different parts of the world.{{Citation needed|date=April 2022}}

It is a known problem that high levels of output of the UVa part of the spectrum can both cause cellular and DNA damage to sensitive parts of their bodies – especially the eyes where blindness is the result of an improper UVa/b source use and placement [[photokeratitis]].{{Citation needed|date=April 2022}} For many keepers there must also be a provision for an adequate heat source this has resulted in the marketing of heat and light "combination" products.{{Citation needed|date=April 2022}} Keepers should be careful of these "combination" light/ heat and UVa/b generators, they typically emit high levels of UVa with lower levels of UVb that are set and difficult to control so that animals can have their needs met.{{Citation needed|date=April 2022}} A better strategy is to use individual sources of these elements and so they can be placed and controlled by the keepers for the max benefit of the animals.<ref>{{cite web|url=http://www.uvguide.co.uk/vitdpathway.htm|title=Vitamin D and Ultraviolet Light – a remarkable process|website=UV Guide UK|access-date=2017-01-13|url-status=live|archive-url=https://web.archive.org/web/20160531172209/http://www.uvguide.co.uk/vitdpathway.htm|archive-date=31 May 2016}}</ref>