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> The bulbs Flagstaff relied on for most of its streetlights were low-pressure sodium—a variant that only emits light at a single wavelength (589 nanometers) ne
by dmazin 7y ago
> The bulbs Flagstaff relied on for most of its streetlights were low-pressure sodium—a variant that only emits light at a single wavelength (589 nanometers) near that yellow color, producing something resembling candlelight.
Even 10 years after college I distinctly remember the look of Flagstaff at night. Namely because the city was effectively grayscale and it was beautiful.
By the way, if you don’t know, Lowell Observatory in Flagstaff is where Pluto was discovered.
- nullc 7y ago> Even 10 years after college I distinctly remember the look of Flagstaff at night. Namely because the city was effectively grayscale and it was beautiful. San Jose used to look that way too. There are still pockets of LPS lights here and there, but since most makes are not commercially available anymore as of this year you can expect they'll vanish fairly quickly. Such a loss, LPS streelighting was very good. I hope the narrowband amber LEDs are a commercial success. Anyone know where there are fixtures with them available in small quantity? ... I stocked up on LPS bulbs before they went unavailble, but they won't last forever.
- emelski 7y agoI found that the LPS lighting in San Jose was very close in color to yellow traffic signals, which made it sometimes confusing (and therefore more dangerous) to drive there after dark.