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Re:Nobody Cares by matthewdgreen on Thursday January 16, 2025 @01:16AM (#42721949)
Here in Baltimore the city seems to have purchased a huge batch of defective LEDs that are actually purple. It’s disturbing when you encounter one.
Re:Nobody Cares by 1659447091 on Thursday January 16, 2025 @03:16AM (#42722745)
The city employee who bought them is probably a massive Ravens fan...
Re:Nobody Cares by gunian on Thursday January 16, 2025 @04:10AM (#42723126)
i mean who wouldn't be the way they're playing
Re:Nobody Cares by josephcsible on Thursday January 16, 2025 @01:50AM (#42722153)
Nitpick: "are actually purple" makes it sound like they came out of the factory purple, but they're actually changing from white to purple over time as the phosphor coating fails.
Re:Nobody Cares by NikkiA on Thursday January 16, 2025 @08:03AM (#42724593)
They'll be near-UV LEDs with a phosphor to produce white, high efficiency, low cost, but garbage long term.
Re:Nobody Cares by matthewdgreen on Thursday January 16, 2025 @09:32AM (#42725645)
Just to be clear, these are about 1-3 years old. So yes they probably weren't purple on the day they were installed, but this is a defect and not normal aging. https://www.reddit.com/r/todayilearned/comments/136nz3b/til_...
Re:Nobody Cares by Peanuts99 on Thursday January 16, 2025 @04:42AM (#42723326)
Might be so that they don't interfere with a certain species of wildlife. We have deep blue ones near me that aren't visible by a protected bat species.
Re:Nobody Cares by i_am_proteus on Thursday January 16, 2025 @05:31AM (#42723641)
Re:Nobody Cares by tuumi on Monday January 20, 2025 @01:38PM (#42771654)
Re:Nobody Cares by lesona on Thursday January 16, 2025 @07:53AM (#42724526)
They’re purple (blue is the other option) because veins are harder to see under purple light. They’re used to deter drug use, from my understanding.

Edit: final clause

Re:Nobody Cares by headsupernova on Thursday January 16, 2025 @10:05AM (#42726223)
Not true, they're just defective and degraded quickly, resulting in the odd color.