I will be switching over to all LED Christmas lights eventually....since they are relatively still new on the market, if I give it a few years and use the stuff I have, by then I should get the better type of LED they come out with.--well not so much better, but I can see all the new styles and such.
I don't leave lights on a long time anymore. I do 2 hrs. From 6 or 7 to 9 then off and that saved money instead of just leaving them lit outside for alot more hours.