Diya is a lamp made of clay with a cotton wick dipped in ghee. Diyas originate from the Indian subcontinent and hold a sacred place in Hindu, Sikh, Buddhist and Jain prayers, as well as religious rituals, ceremonies and festivals, including Diwali.

Clay diyas are symbolically lit during prayers, rituals and ceremonies; they are a permanent element in homes and temples. The warm, bright glow emitted by the diya is considered auspicious - it represents enlightenment, prosperity, knowledge and wisdom. Diyas represent the triumph of light over darkness, good over evil, with the most notable example of this being on the day of Diwali. Diwali is celebrated every year to celebrate the triumph of good over evil, as told in the Hindu epic Ramayana.