An Indian potter makes earthen lamps for Diwali, the Hindu festival of lights, in Kolkata, India, Oct. 21, 2019. Diwali is the Hindu festival of lights which is celebrated all over the country. (Xinhua/Tumpa Mondal)

Children color earthen lamps for Diwali, the Hindu festival of lights, in Kolkata, India, Oct. 21, 2019. Diwali is the Hindu festival of lights which is celebrated all over the country. (Xinhua/Tumpa Mondal)

Indian potters prepare earthen lamps for Diwali, the Hindu festival of lights, in Kolkata, India, Oct. 21, 2019. Diwali is the Hindu festival of lights which is celebrated all over the country. (Xinhua/Tumpa Mondal)

An Indian potter prepares earthen lamps for Diwali, the Hindu festival of lights, in Kolkata, India, Oct. 21, 2019. Diwali is the Hindu festival of lights which is celebrated all over the country. (Xinhua/Tumpa Mondal)

An Indian potter prepares earthen lamps for Diwali, the Hindu festival of lights, in Kolkata, India, Oct. 21, 2019. Diwali is the Hindu festival of lights which is celebrated all over the country. (Xinhua/Tumpa Mondal)