The point to note here is that it urges us to focus on the Supreme, the Atman or the Self (which is self-luminous) and access our divine nature. As Sri Chinmoy says, “There is not a human being who does not have within him this infinite consciousness  and thus self-illumining light.”Light is also used widely in meditation. Gradually all else in our field of vision fades out and one literally merges with the light from the flame. In lighting the lamp we acknowledge not only knowledge but also the source and giver of knowledge.  
Practitioners of meditation are often asked to visualise a white light or focus food factory lighting manufacturers on a candle flame. When  the flame of the lamp burns brightly it is akin to our negative tendencies being destroyed and the ego being subsumed.5 — “This is the message we have heard from Him and announce to you that God is light and in Him there is no darkness at all. This is because lamps have a way of altering the energy around them and exuding a great deal of positivity. The light that dispels the darkness of ignorance is the light of knowledge. Recognising and acknowledging that one light that shines through our inner self and all creation is the ultimate realisation.  
Light, whether it is the light emitted by the sun or the moon or the stars or fire, is all the same. Gazing steadily at the candle flame not only aids concentration and promotes single-minded attention, it is at once calming and stilling. Hence, a glowing lamp is verily knowledge itself in a manner of speaking.T Lamps are of tremendous religious and spiritual significance because they have a way of altering the energy around them and exuding a great deal of positivity NEW1.  
While material wealth and riches can come and go or be taken away, knowledge is permanent. Lamps at and around Diwali are a lovely way of welcoming  Goddess Lakshmi who incarnated  on the  day of the new moon  during the churning of the ocean, Lord Rama on his return after killing Ravana and to celebrate the triumph of good over evil, with the slaying of the demon Narakasura by Lord Krishna. The oil in the lamps represents our negative tendencies and the wick our ego. A characteristic quality of a lamp flame is that it always burns upwards.May the festival of lights illumine and brighten your path and life in a myriad, meaningful ways!