"Karthigai" is a month of purity and devotion. Hindu devotees in Sri Lanka celebrated the festival of "Karthigai Deepam" in the temples and houses on December 12th 2009. It falls on Unduvap Poya day, which coincides with Karthigai star.

There is a story linked between "Karthigai" and lamps according to religious references. Brahma- The Creator, and Vishnu- The Preserver had a dispute between them as to who was greater, and who was the supreme. The Lord Shiva wanted to teach them the truth. He appeared before them in a form of huge column of fire.

Both of them referred their quarrel to Lord Shiva. He told them that he who could discover the crown of the light or its foot first might be considered as the superior. Accordingly Brahma took the form of a swan and flew up in an attempt to find the crown of the Light, while Vishnu took the form of a boar (Varaha) and began to dig down to find the foot of the Light. Neither of them succeeded. The knowledge dawned upon them that the Light was superior to both of them.

The Karthigai Deepam is celebrated to bring out this great truth that the supreme God is far beyond the Creator and the Preserver. Brahma and Vishnu thereupon prayed to the column of Light.

In the 'Kalavazhi Narpadu', which dates back to the third Sangam period (after 1,000 BC) the poet says, "In the battle the blood oozing out from the dead soldiers' bodies is like the red coloured flame of the lamps lit during Karthigai Deepam festival".

Tolkappiyam, the oldest available work dating back to 2,000 or 2,500 B C, has concise verse form rules for Tamil grammar. In one of the formulae, Tolkapiyar uses the phrase "like the lamp's flame pointing upwards".

Earthen lamps are significant to Hindu rituals and festivals. Light is indispensable for Karthigai Deepam. On this special day light is spread everywhere.