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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 phos
by josephcsible 2y ago
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.
- NikkiA 2y agoThey'll be near-UV LEDs with a phosphor to produce white, high efficiency, low cost, but garbage long term.
- matthewdgreen 2y agoJust 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_since_2020_white_led_streetlights_have_been/ https://www.reddit.com/r/todayilearned/comments/136nz3b/til_...