[PaulKeeble]

There are multiple things that we really need to make it viable. A standard for the plug that separates it from any AC standard, a standard voltage and current and then standard DC to DC convertors for adjusting the voltage. I guess also we need a completely different light bulb fitting socket too that only fits DC light bulbs. Lots of different commercial DC convertors of varying sizes to replace the AC convertors in all sorts of devices.

I do wonder how much in practice would be gained given the DC to DC conversions are guaranteed for every device.

[eternityforest]

We do have a standard AC-DC converter, USB PPS, which can do most of these use cases just fine. DC-DC versions can be done too if one really wanted.

But running low voltage DC power wiring is still probably not the best plan.