The traditional lamps which is lit during every auspicious occasions; in temples before the worship starts; at the official and unofficial functions.
Vilakku/dīpam (lamp) is one of five accessories of religious worship in Hinduism, Jainism and Buddhism; others being puṣpa (flowers), dhūpa (incense), gandhā (sandalwood paste) and nivedya (food).
Worshipping deities with these five accessories is generally considered as a way for achieving the four ends of human life; dharma, artha, kama and moksha.
As the sun sets, young girls of the family bring the lighted lamps to the verandah of the house, continued with evening prayers.
[3] A special type of Nilavilakku, called Aal Vilakku is used in Temples of South India, especially in Kerala.