Streetlights Are Mysteriously Turning Purple. Here's Why
Newly purple streetlights might seem innocuous, but they could affect driver and pedestrian safety
![Streetlights Are Mysteriously Turning Purple. Here's Why](https://static.scientificamerican.com/sciam/cache/file/2F542664-9DAD-438E-81DEE2C391844E1B_source.jpg?#)
Newly purple streetlights might seem innocuous, but they could affect driver and pedestrian safety
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