A clip I designed to hold a pair of strip lights I built so that I can stream pinball machines without worrying about the amount of light on the playfield. Print four, stick on magnets, and if needed install some metal panels on your siderails to help hold them on.

My lighting strips are built using this set of V-channel aluminum extrusion. https://www.amazon.com/gp/product/B01MS89UER/

These are the magnets I attached to the clips. https://www.amazon.com/gp/product/B07R17XH4Y/