[[Lysdiode]]r er i dag (2006) lige så effektive som lysstofrør. <ref>[http://www.cree.com/press/press_detail.asp?i=1160427137863 October 9, 2006, Cree Delivers the First 160-Lumen White Power LED] {{Webarchive|url=https://web.archive.org/web/20110831045452/http://www.cree.com/press/press_detail.asp?i=1160427137863 |date=31. august 2011 }} Citat: "...XLamp LEDs now as efficient as fluorescent sources...The new XLamp LED was designed to enable general lighting applications, such as street lighting, retail high bay lighting and parking garage low bay lighting, as well as to vastly improve the light quality in consumer applications such as flashlights..."</ref>
Derfor (og pga. af lysdioders lange levetid) erstatter lysdioder i disse år glødepærer i mange sammenhænge, f.eks. som trafiklys.
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