This lighting choice is commonly described as broad lighting versus short lighting.

• Broad lighting: the side of the face turned toward the camera is lit, so the visible area of the face appears brighter and wider.
• Short lighting: the side turned away from the camera is lit, leaving more of the camera-facing side in shadow, so the face appears narrower and often more dramatic.

In general portrait use, broad lighting tends to feel more open, straightforward, and less dramatic. Short lighting usually gives more shape, depth, and mood because the shadow is more prominent from the camera’s point of view.

So the main thematic difference is usually:

• broad light = wider face appearance, lighter/open feel
• short light = slimmer face appearance, more sculpted/dramatic feel

The exact emotional impact still depends on the strength of the light, contrast, expression, and background, but the basic distinction is broad vs short lighting.