
These are the light bulbs we've replaced with CFLs over the past few weeks. Made the last big switchover today.
The timing is very nice -- tomorrow is our one year anniversary in the house, so beginning tomorrow, we'll have a pretty accurate apples-to-apples comparison of energy usage and PG&E bills.
Today I even made a spreadsheet to analyse usage last year to this year, and month to month. Here's what I know so far: Last year, we used an average of 33.4 kilowatt hours a day and paid an average of $0.21 per kilowatt hour. When I insulated to spa last July, usage dipped significantly. I marked the months I know I changed the spa water, but obviously there were some I missed.