Wikipedia
Kumbhabhishekham( Tamil: குடமுழுக்கு / Kudamuzhukku) is a Hindu temple ritual that is believed to homogenize, synergize and unite the mystic powers of the deity. Kumbha means the Head and denotes the Shikhara or Crown of the Temple (usually in the Gopuram) and Abhisekham is ritual bathing. Kumbhabhishekham is widely celebrated as a festival in South India and especially in the State of Tamil Nadu.
On the appointed day and at an auspicious time, the Kumbha is bathed with the charged and sanctified holy waters in the sacrificial pot and, by a mystic process, these pranic powers trickle down a silver wire and enter the deity installed inside the sanctum sanctorum of the temple. The deity, which was until then only a granite sculptured stone image, is believed to transform into a vibrant and vivid living representation of the deva with innate beatitude, grace and grandeur, conferring divine blessings on all devotees.