Especially since the sun is down for such a large portion of the day, these lights really brighten my spirits. I'm always a bit sad to see them come down (sometime in April). I have them all on timers so they come on when I get up in the morning, turn off for a bit while the sun is up, and are on again until about midnight (which makes for a good incentive to go to bed before then).
The lights also brighten my mood in cold weather--not that it's been that cold lately. While I am tired of the rain and warmer temperatures, I am taking some comfort in our current weather forecast, which indicates we might see a nice blanket of snow soon. Seeing the colors from our lights reflect off the white snow is another one of the joys in my life.
Sure, putting up the lights might have been a mistake considering how my shoulder has complained since. However, I'll take the trade-off if it means have more light in my life.