Karthigai Deepam happens to be an important and auspicious occasion in tamil calendar. Most Tamils respect this occasion when Lord Muruga was born. The household matters are taken care of and lamps are lit almost every part of the house to bring peace and prosperity. The woman worship to bring happiness in the lives of their children and ward off all the troubles in life.
The functioning of lamp implies a great spiritual notion. The wick in the lamp symbolizes our ego and the oil that is used to light the lamp denotes our innate nature that is responsible for the ego to thrive. The flame, the spiritual knowledge has the capacity to blaze our ego, the wick by emptying our innate tendencies. This is the significance of Karthigai Deepam.
Lights symbolize the victory of the good over the evil. people try to make their homes protected from evil eyes and evil forces. They want to bring in peace and prosperity in the families for life. They pray honestly to god to give them good feelings for other human beings. Lamps CAN give the power to shed of fear and bring in victory in the lives of people.