> Why would it need to be 220 V in the "socket" for the bulb? Why do we need lamps themselves to just be a frame to hold a wire, why not put the driver circuitry in there to step it down to whatever voltage we decide to drive the DC LED bulbs at?
I was talking about the lamp itself. Maybe I used the wrong term? I meant the fixture which holds the wire and expects a bulb. That fixture needs to go into mains, because that outlet may have to also service something else entirely.
Now, sure, usually those fixtures tend to be larger than the bulbs, so they could hold the conversion circuitry. I'd be fine with that. But the commenter I was replying to talked about having an alternative DC circuit for the lights.
Sure, and we can have that too, in the places where the lights are built-in to the ceilings or cabinets or whatever. When we have lights in the ceilings, the fixtures again can handle this specialized LED bulb style. And one might even link several lights into a single DC circuit for all the lights in the room versus having each individual light do its own AC->DC conversions in compromised envelopes.
I was talking about the lamp itself. Maybe I used the wrong term? I meant the fixture which holds the wire and expects a bulb. That fixture needs to go into mains, because that outlet may have to also service something else entirely.
Now, sure, usually those fixtures tend to be larger than the bulbs, so they could hold the conversion circuitry. I'd be fine with that. But the commenter I was replying to talked about having an alternative DC circuit for the lights.