Have you seen Purple/UV Street Lights around you?
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It's actually not something covert. It's a manufacturing quality problem wherein components fail and the units have to be replaced with better quality devices. However this purple light problem is real and is widespread in some communities.
If it hurts, the lamps may be putting out a lot of ultraviolet. Here's a test: have something that is fluorescent orange. If it appears bright orange at night under the lamp, that's a sure sign this is an LED lamp whose internal phosphor has failed and it lets dangerous UV from the diodes out. (UV causes fluorescent materials to glow and actually emit light.)
A white light LED works like this: the LED actually puts out ultraviolet at the core. The LED converts that to white light by having a phosphor coating around the emitter to do that, they operate just like a standard fluorescent tube light. In the street lights with a manufacturing defect, the coating degrades and lets purple and UV out. And that damages eyes.
This may be topnotch Chinese LED quality here, where they are shoddy just to save a penny.
If the light hurts your eyes at night, blueblocker glasses can stop the UV. They will look clear for ordinary light but they block UV wavelengths. Might be useful for a cop on night patrol.
Humans can't see UV but your eyes can be damaged by it.
For LEDs putting out UV, we can also see nearby wavelengths which get pumped out too, so seeing purple in this LED case means there is some UV.
A conclusive test is when dyes that are daylight fluorescent are glowing in a light source, it is putting out UV. Another test is that many washing detergents have brighteners in them, and if your shirt glows a bit bluish under a purple streetlight, that is a sign the detergent residue is reacting to UV hence there IS UV.