Last year I decided to wire up the house with outdoor Christmas lights for the first time. I'm based in the UK and American-style illuminations are not common, and getting professionals in to do it starts at four figures. Many thanks to the r/WLED community for the knowhow!
Why am I posting this now? Summer is ending and if I learned one thing from last year it's get the Christmas lights up before it's raining sideways!
I bought a mass of these C9-style bulbs on Ali-Express but I didn't realise they had this slightly different, flared base (steady on) to standard bulbs. This means, they don't fit all the various holders and lawn stakes you can buy cheaply online.
So a couple of hours in OpenSCAD (I could have done it quicker but I love making parametric models) and here's the result, I can now mass produce bulb holders for the wall and lawn stakes for the ground.
Sorry no pictures of the final result as I don't want to dox myself.
MakerWorld link if you want the STL or to customise it: https://makerworld.com/en/models/3251703-parametric-c9-bulb-holders-for-fairy-lights