The calm, cool twilight is loved by all. This is the end of a days journey for the Sun Lord, with a colourful evening leading the day into total darkness. This time of twilight is called the Trisandhya. Trisandhya is divided into sandhya, madya sandhya and saayam sandhya. Dawn which is a transition from darkness to light and dusk which is a transition from light to darkness, both bring a sense of peaceful tranquility to the mind. We welcome dawn by lighting a lamp. Similarly we should bid goodbye to the light in the same way. The female of the house must wake up early in the morning at Brahmamuhurta (the time between 04:24 am to 05:11 am) and light the lamp after cleaning herself. The sun is the creator of both night and day. And the Sun is fire or agni. Agni cleanses everything. This is why every pooja starts with agni. Even the Vedas start with incantations of agni. This fire is what cooks the food that we consume everyday. After praising agni, we should praise our ancestors and Gods. Even though we do not see them, their presence can be felt through the presence of agni. After lighting the lamp, the first thing to be done is waking the children of the household. This is the best time for them to study.
The lamp should be kept lighted either inside the pooja room or on the porch. Place two, three or five wicks in the lamp. If there are two wicks, one should be facing the east and the other should be facing the west. A burnt wick or a wick used earlier should never be reused. Never extinguish a lamp because of lack of oil. Also do not use your fingers to pull out the wick. All these are bad signs. Also take care not to blow out the fire on the wick. Always submerge it in oil to extinguish it.
Think of your favourite deity while praying in front of the lamp. Only use bronze lamps. Lighting chuttuvilakku in temples is a sign of prosperity and wellbeing. This lamp will cast away the shadows surrounding you physically and mentally.