[Izkata]

The ones around here direct the light downwards at the street instead of almost-every-direction like the old ones did, so it's kind-of true that the LED ones have less light pollution (I know I'm getting a hell of a lot less light into my windows), but it's because of the lamp shape and not that they're LEDs.

[throwawayben]

yes this was my observation, since the ones outside my house were replaced I have much less light into my house and I can see the stars. I assumed it must be some factor of the LED design that makes it easier to direct downwards though

[actionfromafar]

For astronomy, the pollution upwards is the problem.

For insects and mammals and birds, it's the spectrum, the colour, which is the problem.

[actionfromafar]

Here it's the other way around. The new shapes are bonkers.