The room was in complete darkness except the middle part of the room.

[Jit833]

1) The room was in complete darkness except the middle part of the where it is lit up by the light from the street light that stream through the window. I like to stand in the circle of that light.

[Raymott]

1) The room was in complete darkness except the middle part of the where it is lit up by the light from the street light that stream through the window. I like to stand in the circle of that light.

"The room was in complete darkness except for the middle part of the, where it is lit up by the light by rays/beams from the street lamp that stream through the window. I like to stand in the circle of that light."
Using "lit, light, light, light" in a two-line paragraph is too much.