<?xml version="1.0" encoding="utf-8"?><mads xmlns="http://www.loc.gov/mads/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.loc.gov/mads/
mads.xsd"><authority><topic authority="http://AATesaurus.cultura.gencat.cat/aat/getty_en">mercury lamps</topic></authority><related type="narrower"><topic>high-pressure mercury lamps</topic></related><related type="narrower"><topic>low-pressure mercury lamps</topic></related><related type="broader"><topic>high-intensity discharge lamps</topic></related><variant type="other"><topic>lamps, mercury</topic></variant><variant type="other"><topic>lamps, mercury-vapor</topic></variant><variant type="other"><topic>mercury lamp</topic></variant><variant type="other"><topic>mercury vapor lamps</topic></variant><variant type="other"><topic>mercury-vapor lamps</topic></variant> <note xml:lang="en"><![CDATA[ Lamps in which light is produced by an electric arc between two electrodes in an ionized mercury-vapor atmosphere; they give off a bluish-green light rich in ultraviolet radiation. ]]></note></mads>