Chicago has been slowly replacing its yellow sodium streetlamps with efficient LEDs that project down instead of up. They've been working block-by-block in a systematic way that you can see when you fly into the city at night. It's quite dramatic.
(Somewhere around Peckham, I've a feeling near Sceaux Gardens, IIRC.)
The first observation was the it was like living with nearly a full moon out all the time; this increased after all lights were replaced. They produce very clean light which appears to reflect more than the old orange light color. the second was that birds in my front holly bushes and thuja trees took some time adapting to the newly lit world; at first they sang/chirped at night hours.
LED lights are amazing for efficiency to the point light pollution will increase simply because it cost so little to keep the lights on; I know I am guilt of that around Christmas as I run nearly five hundred feet of LED lighting then and don't even see the effect on my bill
[0] https://www.citymetric.com/horizons/you-can-see-berlin-s-eas...
Edit: As I continued farther downthread, I saw that this had already been mentioned; my apologies.
I discovered LED headlights on cars don’t melt off the ice like incandescent do the last time I drove in an ice storm.
Streetlights face down and don't have a cavity to fill with snow.