I broke down and bought a set of these, hopefully they will last about 20 years Lol. They are very cool, you can get a set of 400 or 200. Of course they work off of wifi and a App. The App has a mapping feature using the camera on your phone to know where every light it. I have to say it works very well. I found the 400 light set I got was plenty for a 6ft tree

150 Lights Click to follow link...

400 Lights Click to follow link...

600 Lights Click to follow link...