Interpreting きている


My question is how to understand きている when used after verbs like 入る etc. For
example:

> 太陽の光が中に入ってきているのでとても明るい空間になっていて

How is the きている to be interpreted here? I guess in my head the question stems
down to how this is meant to be parsed. Does it mean:

  * The sun's light has come inside and remains inside
  * The sun's light is coming inside (present tense)

Part of my question stems from the fact that 入る to me is more of an
instantaneous (not sure what the term is) verb rather than something that has
duration.




入る is a punctual (instant state-change) verb when the subject is a human or a
small object. However, in this context, 入っている is progressive, "light is coming
in", because sunlight is not something that can remain in the room.

Likewise, プールに水が入っている can mean both "the pool has been filled with water" and
"the pool is being filled with water" depending on the context. Compare it
with 箱にボールが入っている, which usually only means "there is a ball in the box".

(て)くる has [several roles](https://japanese.stackexchange.com/q/676/5010), but
here it is just for describing the physical direction (light is coming
_toward_ the observer). This くる has nothing to do with the aspect.




入る is a punctual (instant state-change) verb when the subject is a human or a
small object. However, in this context, 入っている is progressive, "light is coming
in", because sunlight is not something that can remain in the room.

Likewise, プールに水が入っている can mean both "the pool has been filled with water" and
"the pool is being filled with water" depending on the context. Compare it
with 箱にボールが入っている, which usually only means "there is a ball in the box".

(て)くる has [several roles](https://japanese.stackexchange.com/q/676/5010), but
here it is just for describing the physical direction (light is coming
_toward_ the observer). This くる has nothing to do with the aspect.

