It's always good to remember that UL is a private company that needs to make a profit.
UL gets into the music quality / branding market
I leave this for you all, but sigh, just sigh.
http://www.ul.com/inside-ul/ul-introduces-new-audio-quality-verification-mark/
http://www.ul.com/inside-ul/ul-introduces-new-audio-quality-verification-mark/