My neighborhood in Washington, DC recently replaced a number of old sodium streetlights with new LED streetlights. The number of lights was doubled, but power c

My neighborhood in Washington, DC recently replaced a number of old sodium streetlights with new LED streetlights. The number of lights was doubled, but power consumption was still halved. The ballasts on the LEDs angle down at about 45 degrees—light pollution is reduced by 80% as a result. The LEDs are a much brighter color temperature but I worked with the city to get them reduced from 4000K to 3000K (which has very little blue light). All in all, a big win. There are technical solutions these days, and they pay for themselves. However, municipalities often operate on auto-pilot; let your local officials know where you want them to head.