I’ve the Lego Volkswagen T1 Camper van 🛒#ad (which I made a MOC for at Lego T1 Trailer MOC) and just received my LED Lightning Kit 🛒#ad (or AliExpress 🛒#ad) after my experience with the Bugatti Chiron one It came with a very simple instruction manual (in comparison to the Chiron kit), and was able to have them installed within 10 minutes with minimal disruption to the pieces and powered via a power bank....
I’ve the Lego Bugatti Chiron 🛒#ad (more pics at its review and just recently via a credit coupon I got a LED Lightning Kit from Lightailing 🛒#ad (or AliExpress 🛒#ad). It came with an instruction manual with 118 steps to get them installed and a plastic box with all the components required. Power was not included as I was planning to use a power-bank. To be honest, the installation is not hard, but neither easy, it requires being extremely careful to properly place the wires and replace the original pieces with the ones supplied (for brakes and front lights) and be careful about the laying of the wires to allow them to fit in the proper places and still have room to locate the battery box....