Review on CYLAPEX Color Changing Fairy Lights - 2 Set, Battery Operated Twinkle Lights with Remote, 16 Colors, 50 LED on 16.4FT 4 Wires, Waterproof String Lights for Bedroom, Christmas, Patio - Powered by 3AA Batteries by Balakrishna Tam

I was looking for something that could be used outdoors during Halloween, Thanksgiving and Christmas and that didn't require running extension cords. They meet all requirements! They're easy to use, the remote control is great (although you do need to be sure the receiver isn't covered or buried). One remote control works with multiple lighting sets. The description says 6 hours on 3AA batteries, but I ran it 4 hours a night for a week and haven't had to change the batteries yet. I actually bought a few extra sets because I liked them so much.