You can actually get a macro light for pretty cheap. There are, obviously, a huge range of options and the price goes from under $25 to almost $1,000. I usually just use available natural light.
If you're not taking photos of living creatures, you can set up some cheap reflectors. In a pinch, use a flashlight and a piece of wax paper as a diffuser!
Nice, I will have to look into a light. I had no idea . I'm going to try the wax paper and flash light haha thanks
Some of the ring lights for macros screw into the filter threads, so you just have to find the right size. I think those are more for insects, but still useful. They make another type with two mini flashes on positionable wires that look interesting, but they're more expensive.