I am using LED bulbs in many of my light sockets. One problem of waste heat that's not often mentioned is that most of these bulbs have AC-DC converters which have heatsinks which radiate a fair amount of heat on their own. While I'm sure it's "less" heat than a conventional bulb, it's heat and I don't want it.
It seems to me if we are going to be serious about all of this, we should convert our overhead lights and many receptacles to DC power generally compatible with LED lights and a collection of other devices which might be better suited to DC power.
I get it. AC power is great for transmitting power over great distances. But the way things are, every device must convert the power to make use of it with the exception of a few devices like ovens and large appliances like that. But my TV, my computers, my lights and a lot of things convert from AC to DC which is wasted power and wasted heat. Like many greener, more energy efficient data centers out there making a single conversion of AC to DC and powering all servers and relevant devices directly off of DC power sources, why aren't we doing the same at home? It makes sense if only for lighting.
As a plus, wouldn't it be nice if I could jumpstart my car directly from my house?
Anyway, I'd like to see some more seriousness about that. I'm no tree hugger, but I love the idea of being efficient.