A little lamp is a must in all Hindu rituals.
“Aum Asato mā sad gamaya
Tamaso mā jyotir gamaya
Mṛtyormā amṛtam gamaya
Aum śānti śānti śāntiḥ ” (Bṛhadāraṇyaka Upaniṣad 1.3.28)
English translation ……
From ignorance, lead me to truth;
From darkness, lead me to light;
From death, lead me to immortality
Aum peace, peace, peace.