A 9W germicidal <a href="https://en.wikipedia.org/wiki/ultraviolet" class="extiw" title="w:ultraviolet">ultraviolet</a> <a href="https://en.wikipedia.org/wiki/Compact_fluorescent_lamp" class="extiw" title="en:Compact fluorescent lamp">lamp</a> in a modern compact-fluorescent form factor, It emits shortwave UV-C rays, and is used to sterilize laboratory equipment and in water treatment.
<a href="//commons.wikimedia.org/wiki/User:Atlant" title="User:Atlant">Atlant</a>
CC BY 2.5
<span class="int-own-work" lang="en">Own work</span>