Easy & Ready To Use These cotton wicks are made in such a way to use them directly. You just have to place it in the diya and fill it with oil or ghee & enlighten it. Can Be Used In Temples or On Festivals According to Indian traditions, Diya is used during worship in Temples and festivals like Navratri and Diwali. Ideal for Home Decoration Diya home décor is everywhere on social media these days. You can also use it in your home to bring that magical effect.