While putting together notes for [my talks over the weekend](http://green-change.com/2009/06/14/welcome-super-challengers/), I noticed something interesting. The amount of electricity we saved each day by [converting 10 halogen downlights to CFLs](http://green-change.com/2009/05/25/converting-halogen-downlights-to-cfls/) (4 kWh) is about equal to the amount of electricity we are generating each day (on average) since [installing a 1 kW grid-connect solar power system](http://green-change.com/2009/05/18/we-now-have-solar-power/). … [Read more…]