Remix from Ceiling Clip for Skyrail Marble Roller by MrWigdahl, published Jan 16, 2017 https://www.thingiverse.com/thing:2041464

which was a remix of Hanging Clip for Drop Ceilings by scampbell, published Nov 23, 2016 https://www.thingiverse.com/thing:1912980

The original design by scampbell was great for a clip easy to attach but the hook would not allow to fit the type of lights I had. Then found the remix by MrWigdahl. However, I found the the clip to be too thick for my needs as it was to install something temporary at work and also needed to print many. Wanted to reduce my printing time and material cost.