The emphasis of the personification phrase 'The feeble light is wasting gradually' suggests that the light is 'wasting' away as time continuously travels by and as it fades away so to does the prisoners hope. This makes the audience relate to the prisoners in the story due to the weakness that is conveyed in the adjective 'feeble'. The effect that this brings onto the reader is that it relates to the phrase 'light could struggle' proposing that both the light and prisoners are struggling through a comparable situation.