Why doesn't blanche like bright lights?

Blanche DuBois, a character from Tennessee Williams' play "A Streetcar Named Desire," avoids bright lights because they expose her fading beauty and the reality of her troubled past. She uses dim lighting as a way to mask her vulnerabilities and create a more flattering illusion of herself. Bright lights symbolize truth and harsh realities, which she desperately seeks to avoid as she clings to her fantasies and delusions.