The High Pressure Sodium Light: Ubiquitous, effective, but good?

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Ever wonder why street lights are orange? For such a fast-paced world technology-wise, it seems somewhat odd that we are still using such a strange color of light for outdoor lighting. Well it turns out it is still a pretty good light source, though with limited use and perhaps a not-so-obvious flaw.

Link to Part 2:
https://youtu.be/wIC-iGDTU40

The video from The Engineer Guy:
https://www.youtube.com/watch?v=DIGqBb3iZPo

Some various links:
The Wikipedia Article on Discharge Lamps:
https://en.wikipedia.org/wiki/Gas-discharge_lamp

An interesting source about lighting in general:
http://www.edisontechcenter.org/SodiumLamps.html#hps

Spectral sensitivity of the eye (this is a bit of a spoiler for the next video, so open with care):
https://light-measurement.com/spectral-sensitivity-of-eye/

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Видео The High Pressure Sodium Light: Ubiquitous, effective, but good? канала Technology Connections