Reply #5: Why does it have to be in one block? But if I must, and since I work,

[Curmudgeoness]

I would do 7 am to 7 pm. You would think when it is dark is a good idea, until you think about your refrigerator and heat (electric or gas since you need electricity for the fan in gas heat). Living through an 8 day electricity outage during a hurricane, this was all that really really mattered.