I've been reading Sylvia Plath in Context (Cambridge University Press 2019), and in particular the essay by Sarah Corbett, "'A Certain Minor Light': Plath in Brontë Country." Corbett discusses a group of eight poems set in West Yorkshire, where Plath's in-laws and the Brontës lived. Plath visited the area a few times after marrying Ted Hughes. The article is fascinating and it is very helpful to read and consider these eight poems as a group:
"November Graveyard" (1956)
"Black Rook in Rainy Weather" (1956)
"The Snowman on the Moor" (1957)
"Mayflower" (1957)
"Hardcastle Crags" (1957)
"The Great Carbuncle" (1957)
"Wuthering Heights" (1961)
"The Rabbit Catcher" (1962)
The title of Corbett's article is from a line in "Black Rook in Rainy Weather":
A certain minor light may still
Lean incandescent
Out of kitchen table or chair
As if a celestial burning took
Possession of the most obtuse objects now and then --
Thus hallowing an interval
Otherwise inconsequent
By bestowing largesse, honor,
One might say love.
This is beautiful and the first line is reminiscent of Dickinson's "certain slant of light," although the moods of the two poems are very different.