3 ms·

It would have to be high voltage DC. Low voltage just can't send enough power - you need wires as thick as garden hoses. High voltage DC is not useful for the

• umvi 8y ago
  It seems like an efficient house would at least want a "lighting circuit" where you have a single transformer/rectifier/controller driving a bunch of LEDs all throughout your house. That type of lighting scheme seems like it could last decades if you use quality LEDs.
  • zAy0LfpBZLC8mAC 8y ago
    The usefulness seems questionable. LEDs have to be driven with current, so either you would have to have all LEDs in your house in series, with short-circuit switches for light switches, or you still have most of the electronics in every lamp/bulb anyway (saving only the rectifier and maybe needing only a smaller input filtering cap). The former is highly impractical (complete rewiring, one broken lamp makes all lamps in the house go dark, massive peak voltages if you have many lamps, ...), the latter isn't worth it either in device costs nor in efficiency gains (a shottky full-bridge rectifier probably eats less than half a percent of the lamp's power consumption at ~ 100 V supply voltage, less at higher voltages).
• heartbreak 8y ago
  I have 48vdc on my phone line which is thin wire and plenty enough power (amps) for very bright lights. This 48vdc phone line has been in my house for twice as long as I've been alive.