It's generally cheaper to save energy than make it... Toronto Hydro knows this well. To get the ball rolling, they offered "Deck the Halls with LED", a free exchange program... bring in 2 strings of your old Christmas lights and receive 1 of the LED variety. LED can contribute 80-90% energy savings over conventional Christmas lighting. Unfortunately we missed the boat for the free offer (exchange programs ran in various Toronto communities November 16th to 19th)
For energy efficiency reasons, we've never really had a lot of Christmas lights... but, like the idea that adding a little festive colour can now be done with a lot less electricity. The question is: What do we do with the old ones? We'll look into into some creative options this week.
Toronto Hydro has some great information for homeowners on conservation and energy efficiency on their web site.