Those LED indoor/outdoor strings sure look enticing, even though they are about 3-times the cost of the cheapo $4.00 incandescent 100-bulb strings. I guess if they actually last as long as they say, after a few years of futzing around and tossing the incandescent strings, they may actually be less expensive.
It would imagine the energy savings could really add up too, if you happen to decorate your house with lights like the Griswolds.

[Linked Image from christmasvacationcollectibles.com]