The E120 outdoor holiday lights come with only a small amount of clips.  I'd gladly shill out another $15 for some more clips, but they currently aren't for sale.  Instead, they expect your installation to be “permanent” with double sided tape on the back of the LED.  I'm sure the 3m stuff is good and sticky.  But living in Arizona, there's no way they take the abuse for more than a year or two.  Especially since the paint on my soffit is probably 20 years old.  You can obviously but other clips to supplement.  But the WAF (wife approval factor) is much higher when they all match.  I printed in PETG for better heat resistance.

Pictures show the OEM on the left and the PETG print on the right.  On this batch, I printed them face down with supports.  I thought about printing them standing up (X axis rotated 90) with no supports, but the weakest point would then be along a layer line.  That would significantly reduce the structural integrity.  Anyone is welcome to play around with the model.  Maybe you can go rounded edges or other optimizations to maybe print it along it's Y axis with no supports.  But for my purposes, I just wanted to match the existing clips as closely as possible.  Enjoy!