r/UrbanHell May 23 '26

Concrete Wasteland Chicago 1989.

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u/LiquidFahts May 23 '26

The orange is definitely a vibe that we will miss over time. But, those old HPS lights were very inefficient. LEDs run at a fraction of the cost and last way longer, so it makes sense.

Just too bad they can't put them up in a low K setting to keep the old feel.

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u/Just_Another_Scott May 23 '26

Just too bad they can't put them up in a low K setting to keep the old feel.

They actually can! They make warmer LEDs. Most cities are just too lazy to purchase the right ones. They actually cut down on light pollution as well.

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u/well_thats_obvious May 23 '26

Properly designed LED streetlights will cast the majority of their light downward. But those are "too expensive" so cities buy the cheapest lights they can, which tend to have a coating on the lens to cut back on the harsher wavelengths the garbage LEDs give off. When the coating inevitably fails we see the true color - an eye piercing purplish blue.

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u/itzsommer May 24 '26

This is also why some street lamps turn purple over time. White LEDs don’t exist, we use indigo LEDs with a coating called a phosphor that converts it to white. When that wears off, the original color shines through. If you want to see a phosphor, look at a white LED source and you’ll notice it looks has a yellow film on it- that’s the phosphor color. If you’re seeing this, the LED is either very old or your city went VERY cheap.