The lamp represents tilak ( Namah), which is on Lord Vishnu's forehead, which is essentially a straight line drawn vertically upwards. it indicates a clear direction.
(The second symbol is the wheel or chakra in his right hand. The third symbol is the shankha or conch-shell. )
"Agni is a mandatory part of our rituals and is said to be that which purifies". Light up your homes with these divine lamps exclusively for you by the finest Indian craftsmen