Home Depot has an offer to trade in Christmas Lights for $3 per strand for credit toward new LED lights.
This will happen Nov 5 -15. The LED lights will be $5.97, so after the trade-in, it will be $2.97 per strand. You can trade in up to 5 sets per customer. LED lights use 80% less energy. They will even take broken strands for the $3 credit.