TIL the first Blue LED wasn't commercially available until 1989 and bright blue LEDs weren't available until 1993. en.wikipedia.org Submitted by j-merc23 t3_10w8qi9 on February 7, 2023 at 6:12 PM in todayilearned 69 comments 789
positivecynik t1_j7n09g3 wrote on February 7, 2023 at 11:40 PM Reply to comment by ItDoesntMatter59 in TIL the first Blue LED wasn't commercially available until 1989 and bright blue LEDs weren't available until 1993. by j-merc23 I was 13 lol Permalink Parent 14
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