Why do we light a lamp (kuthu Vilakku)?
In almost every Indian home a lamp is lit daily in the pooja room. In some houses it is lit at dawn, in some, twice a day - at dawn and dusk - and in a few it is maintained continuously. All auspicious functions commence with the lighting of the lamp, which is often maintained right through the occasion.
Light symbolizes knowledge, and darkness symbolizes ignorance. The Lord is the "Knowledge Principle" who is the source, the enlivener and the illuminator of all knowledge. Hence light is worshiped as the Lord himself.
Knowledge removes ignorance just as light removes darkness. Also knowledge is a lasting inner wealth by which all outer achievement can be accomplished. Hence we light the lamp to bow down to knowledge as the greatest of all forms of wealth.
Why not light a bulb or tube light?
Then why don't we light a bulb or tube light instead? That too would remove darkness. But the traditional oil lamp has a further spiritual significance. The oil or ghee in the lamp symbolizes our negative tendencies and the wick, the ego. When lit by spiritual knowledge, the negative tendencies get slowly exhausted and the ego too finally perishes. The flame of a lamp always burns upwards. Similarly we should acquire such knowledge as to take us towards higher ideals.
