eksasol: This thread has lost it's purpose.
Sorry - let me help get it back on track.
The cost of LED bulbs has come down a lot. Maybe 3-4 years ago one was looking at $10 or more for a single 40W equivalent. Now you're getting a name-brand 4-pack of 65W equivalents for about that much. Made it much easier to do a big switch throughout the house this weekend. And the lights are significantly better in quality now, too, so we are getting better output with lights that are supposed to be lower in equivalent wattage. Win-win.
Just ordered about 40 LED replacement fixtures for the shop. They'll take the place of the old 8-foot T12 fluorescent bulbs, going from about 1.5A to 0.5A per fixture. Better lighting, no more buzzing noise from the old ballasts, and I shouldn't have to replace any of them for quite a while. Not cheap, and I doubt they'll pay for themselves in my lifetime, but the lighting will be much improved.
All part of a hoped-for transition to a solar array within the next couple years. I don't care so much about the green part of it (I do a bit, but that's not the big reason) - I simply think it's cool technology, allowing one to be their own power company for much of the time. Why pay Northern States Power when I can have them pay me some money to no longer be paying them?
Once the lighting is done, we need to schedule a home performance eval to find all the leaks. That'll be painful. 8,000 sf between the house and shop, and it won't be cheap or easy to take care of all of the inefficiencies. On the upside, done well we can reduce our use by half or better, and then let a solar / wind system take care of much of the rest. Might not get down to NetZero, but maybe we can get close.