Should a light source be point or extended, so that there is a shadow and partial shade behind

Should a light source be point or extended, so that there is a shadow and partial shade behind the object illuminated by it?

A point light source creates radiation that is radially directed (along the radii). Its rays, touching the object, create a clear outline on the screen, into which light does not penetrate. A shadow is formed. An extended light source, as it were, consists of many point light sources, therefore, rays from some part of the source fall into the shadow area, forming penumbra. An example is a solar eclipse. The surface of the earth in which a total eclipse of the Sun is observed (the solar disk is completely covered by the Moon) is in the shadow of the Moon. Where the eclipse is partial (a solar crescent is observed in the sky through light filters), a twilight penumbra is formed on the Earth’s surface.