why did jane faint in the red room

The red-room is dark like blood. It emits strange noises and has a large mirror that distorts Jane's appearance. The late Mr. Reed died there, and Jane imagines his ghost now haunts the room, troubled by wrongdoing regarding his last wishes. Outside it is raining, the wind blows against the moors, faint voices are heard. Suddenly, a ray of light enters the room, and Jane cries out, believing that the light is the ghost of her uncle. Her scream of terror alerts Bessie, Miss Abbot, and Mrs. Reed, but they accuse her of trickery and refuse to free her. After they leave, Jane faints.