a diya, diyo, deya, divaa, deepa, deepam, or deepak is an oil lamp. it is used in the indian subcontinent, mostly in india and nepal. it is usually made from clay and a cotton wick dipped in ghee or vegetable oils. diyas are native to the indian subcontinent. it is often used in hindu, sikh, jain and zoroastrian religious festivals such as diwali or the kushti ceremony.