I use a combined magnifier and lamp- a round fluorescent tube with about a four inch magnifier in the middle. The mounting arm is articulated with adjustable tension knobs. I really recommend a lamp like this for good model lighting. I found mine at a local building supply store (Menards). I also use 2 diopter reading glasses. If I have those on, and look through the lamp magnifier, I REALLY get a closeup view.
The magnifier/lamp I picked up recently is my third. I have been using that kind of lamp now for over forty years, and swear by it.