Kuberan is the god of wealth.
He is regarded as the regent of the north, and a protector of the world and also the owner of the treasures of the world.
He is associated with the earth, mountains, all treasures such as minerals and jewels that lie underground, and riches in general.
Kubera can be invoked on any day but the month of Kartika is deemed special to him. Lighting the Kubera deepam in that month especially on the purnima(Full moon day) is considered very auspicious and shall surely enhance the flow of wealth in our homes and businesses.