So, 18-gauge wire is smaller than a 16-gauge wire.
Curiously, the number indicates the wire size – the smaller the number, the larger the wire. When it comes to choosing wires, you need to look for the AWG designation. Fortunately, LED lights do not draw a lot of current so you don’t have to use large wires. The problem with big wires though is it can be a bit difficult to terminate, and it is not as flexible as thinner ones. You need to know and select the right gauge for your wire system – the bigger the better. Both wires would work with your LED lighting, but it is easier to use the solid core. On the other hand, the solid core is a bit more flexible, and it is easier to make connections with this wire. It requires some soldering to stiffen it up so you would be able to jam it in a connected. Stranded wire is flexible, but it can be a bit tricky to work with. On the other hand, a stranded wire usually contains several conductors in a bundle, with an insulating jacket wrapping everything. The solid core contains a single solid conductor, which is usually copper, and a plastic insulating jacket wraps this conductor.
There are two kinds of wires: solid core and stranded. Should You Get a Solid Core or a Stranded Wire? Of course, you have to consider a few things to get the right size wiring for your 12v LED lighting. In fact, due to the small amount of electricity or current they utilize, you can practically use just about any wire that you can find.