Did mine on Tuesday. Used the new large enclosure LEDs. If the box is to be believed, it will cost me about 46 cents to run them for 6 hours a day for 30 days...regardless it will still be a whole lot cheaper than the old style bulbs!
Oh, just for HookedOnSound....wonderful weather here in Calgary, it was plus 20C here on Tuesday!

I always wait for a Chinook wind before I put up the lights...