Jalani Divya Deep is a very important part of pooja and havan . It can be used daily for doing pooja at home or in a festival like Diwali. Lightning traditional earthen diya is one of the oldest traditions which are followed in Indian Culture.
Have you ever thought that why we light a Diya or Deep. Light is a symbol of knowledge. It also shows the victory over the darkness. It breaks all the barrier of darkness and shows a correct path.
Diwali is a festival of light. In Hindu Religion on this festival people use to light a big number of deep at their home. It removes the bad evils and darkness. This festival was started when Lord Rama came back to Ayodhya after defeating Ravan. People of Ayodhya lighted their houses with Deep in order to express their happiness for Lord Rama.