В письме от среда, 22 августа 2018 г. 19:17:11 MSK пользователь Alessio
Ciregia написал:
"a LED" or "an LED"?
It depends on how you
pronounce it. For instance, there are no doubts with 'an
HP printer', because 'HP' does not form a word. Apparently, LED is an acronym,
so there are variants, but in written form 'an LED' is preferred.
https://www.englishforums.com/English/ALedVAnLed/kgggr/post.htm
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С уважением,
Александр Толстой