I would be more worried about air conditioning compressors, pool pumps, electric resistance heating, and acres of parking lots lit 365 nights a year with metal halide fixtures before worrying about the macro effects of residential lighting on the grid.
From the residential electrical consumer perspective, it would seem that electricity simply isn't expensive enough to motivate a great many of them to invest in alternatives. I do find it curious that electricity isn't more expensive in regions where the grid is said to be straining to supply demand and also wonder what it's going to take for investment in grid/generating capacity to meet that demand lest the grid start to fail more often.
The final bill on nuclear plants has tended to be an appreciable multiple of their original estimate. Could be argued that's a result of post- Three Mile Island paranoia, a shifting regulatory landscape, the long build process, or just the unspoken nature of nuclear design. Sadly, we're still making PWR's/BWR's without a truly workable fuel reprocessing model thus throwing away most of the energy in the fissionable elements in the form of long half-life nuclear waste. And even if we didn't reprocess the fuel, we could make reactors a great deal safer with pebble bed or other form of gas-cooled reactor with immensely simpler and inherently-safe designs.
I do believe that whatever the legacy we leave behind for future generations happens to be, our nuclear waste isn't going to be as big of a problem as it's made out to be.



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