I want to control some WS2811 lights with a Raspberry Pi.
The lights need 24V ~180W ~8A from a supply such as this, whereas the Pi wants 5V and presumably low power from a supply such as USB. I believe both these supplies are switched-mode DC.
Tutorials show the Pi and lights sharing a common neutral line, i.e. the DC 0V output line. (The lights have no ground.) However, they also share a 5V power supply.
If the lights and Pi are to have separate supplies, is it safe and correct to tie the neutral lines?