henq on Nostr: In Europe, Philips in the '50's introduced Natrium lights for streets and highways. ...

In Europe, Philips in the '50's introduced Natrium lights for streets and highways. This orange 'single spectrum' light has 2 big advantages: (1) low electricity usage and (2) the human eye does not get night blinded , because the orange light only triggers the cones in the eyes , but not the rods.
That's why BMW had 'orange only' display in their cars for decades. (This knowledge has been lost on newer generation of car engineers ).