Nanda Deepam lamp is commonly made in multiple regions of the Indian subcontinent, where it holds religious and cultural significance. The production of Nanda Deepam involves experienced artisans and craftsmen who specialize in working with substances such as copper, earthen materials, or other metals. Different parts of India have their own variations related to this cultural practice. https://giriuk.com/category/puja/traditional-indian-lamps/traditional-lamps/