I still have Christmas lights up, and will probably leave most of them up until the snow melts a bit around here. I usually leave some up all year round, but swap them for white ones outside of the various holiday seasons.

I'm mostly using #LED lights these days. These are some multicolored LEDs on a bush in my back yard. I like them, they're more efficient and tend to be less of a pain than incandescent, but the light quality is interesting. The colors are pure, and the green and blue LEDs tend to overpower. Incandescent lights look a little nicer in this case.

That said, if you want to put strings of all one color somewhere, the LEDs have a neat intensity to them, and work well.