I don't usually hang any Christmas lights outside. I save the magic for inside where it's warm and cosy and I don't need to worry about a really long extension cord wrapping around my house and turning anything off and on in the cold.
However I recently got these great NOMA Outdoor Solar-Powered Decorative Landscape Lights to try out from Canadian Tire. They're like those gazing balls that you see in people's gardens, only these ones are holiday red, green, blue and amber. A simple switch on the little solar panel can leave them on autopilot for the season and the sun will do its magic during the day.
The frozen ground proved to be a challenge, but after pouring a bit of boiling water in my garden (in a bulb-less and plant-less area), I easily inserted the little stakes into the ground, stuck the lights on top and that very night had a lovely little glow lining the garden in front of my house. They're like cheerful lollipops in the snow.
These are a great last-minute gift idea for the gardener on your list–or if you get a gift certificate for Christmas and don't know how to spend it!