Five-day festival of lights. Rows of clay oil lamps (diyas) line every window, rooftop, and temple step. Lakshmi, goddess of wealth, visits the cleanest and brightest homes. Fireworks light the night sky. On the main night (Amavasya, darkest night of the month), the victory of light over darkness is celebrated. Over a billion people observe Diwali across Hindu, Jain, Sikh, and Buddhist traditions.