As recreated in Jeff Wall's photographic illustration for Invisible Man,why does Ellison's narrator need light?

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In Ellison's Invisible Man, the narrator is grappling with the question of identity and reality in a society that constantly marginalizes and dehumanizes him. He feels invisible and struggles to assert his existence. Thus, the light in Jeff Wall's photographic illustration represents the need for the narrator to confirm his reality, to be seen and acknowledged as a human being.

As Recreated in Jeff Wall's Photographic Illustration for Invisible Man,why