How are light rays coming from a point source of light different then larger source?

From a point source, the light spreads out in all directions and adjacent light waves diverge from one another. From a larger source, it appears more like the light waves are moving parallel to each other, with little divergence. It's a relative thing. From the perspective of Earth, the Sun's rays are all parallel to each other because the Sun is huge and also because we are so far away from it. So the key differences are:
1. Small, point like source. 2. Being close to the source.
Combinations of 1 and 2 above produce more divergent rays.

Either of 1 and 2 below (or a combination of the two) will produce more parallel rays that don't diverge much.
1. Large light source 2. You're far away from the source.