Diya/Deep/Agal indicates light, purity, goodness, power, and good fortune. The lighting of Brass Diya signifies the removal of darkness and evil forces from one's home, as well as ushering in of joy and hope. Brass Diya lighting is essential during Diwali. The festival is celebrated during the new moon day to dispel the literal and figurative dark forces from life. The Brass Lamp light represents the Atma as well as the Paramatma.