Dark Skies Ordinance to Dim Pittsburgh's Light Pollution | Hacker News

Hacker Newsnew | past | comments | ask | show | jobs | submit

		Dark Skies Ordinance to Dim Pittsburgh's Light Pollution (cmu.edu)
		2 points by Osiris30 on Sept 30, 2021 \| hide \| past \| favorite \| 1 comment

josephcsible on Sept 30, 2021 [–]

I wish low-pressure sodium lights were still popular. It's easy and practical to filter them out wherever necessary since they emit such narrow bands of wavelengths.

Guidelines | FAQ | Lists | API | Security | Legal | Apply to YC | Contact