IMHO, for amateurs, light meters have very limited usefulness. In most cases, you can just use the camera's metering, then instantly check the histogram and adjust the exposure if needed. If your camera has live-view, you can check the histogram before actually shooting.
If you want to know the dynamic range of a scene, you can use the camera's spot metering. It's not as good as having a 1 degree light meter, but good enough for practical use.
I have 5 or 6 light meters, among them a Pentax 1 degree spot meter and a Minolta Auto Meter IV F with 5 degree viewfinder. I use them to teach my son about exposure/dynamic range. I also use the Minolta to calibrate old flash guns that I repair. But I don't use them for shooting.
They are sure fun to play with. So if you find them cheap, get them (I just sold my Vivitar 230 LX for $20).
For outdoors, in particular landscape, many times you can't measure incident light so you have to settle for reflected light. A 1 degree meter is best. I paid $50 for my Pentax spot meter.
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