That's not only dark-sky- but also insect-friendly! Insects are attracted by blueish lights which, for example, the old sodium pressure lamps did not emit. (The

That's not only dark-sky- but also insect-friendly! Insects are attracted by blueish lights which, for example, the old sodium pressure lamps did not emit. (The orange light you might remember from those were the 589nm double spectral lines of sodium.) LEDs can/do emit blueish lights and should be picked carefully for outdoor lighting.