I've heard about the pumping of water, it's really a "gravity well", using current power to move something higher, creating potential energy, and then gravity to bring it back down and release this energy as kinetic. It's just like a roller coaster.

Meltdown can almost be eliminated in some modern, gravity fed nuclear designs. Korea has made big strides here. It's still a problem, but not a deal breaker.

I agree with the light on CF bulbs. LEDs have a very white, almost bluish tint as well. Not sure how well LEDs would work in a closet, course you could just buy all black pants P)

We have a CF bulb in our room as a side light and it was weird at first. Definitely doesn't throw off as much light as a regular bulb, but it's not bad. The spectrum isn't too bad for reading.

I think we might end up removing the dimmers (they came with the house) and moving to CF bulbs in a few more places. I think I might need to invest in 3-4 more LEDs and replace one whole room with them and see how it compares. Right now I've replaced one in a few places with a flood in the ceiling cans, but it's overwhelmed by the incandescents, so it's hard to tell if it's acceptable.