What they talked about, i have no idea … . it was no doubt whatever a young married couple spending their first time privately in each other’s company in the long, probably harried day would talk about. it was the murmur of their voices, the back-and-forth, the unnoticed stretching away of time between my bedtime and theirs, that made me bask there at my distance. what i felt was not that i was excluded from them but that i was included, in – and because of – what i could hear in their voices and what i could see of their faces in the cone of yellow light under the brown-scorched shade.

what is the writer’s purpose of the allusion "in the cone of yellow light under the brown-scorched shade"?

1.she uses few words to convey her theme.
2.she points to their poverty in an attempt to relate to other poor people.
3.she emphasizes the secretive nature of her observing which she mentioned in the paragraph just before this.
4.she compares this shade to those burned in fires