Light is considered as a symbol of auspiciousness, prosperity and abundance in the Hindu religion. Light brings brightness with it and removes the darkness. Light makes it possible to see things clearly. Following Sloka / Shloka can be recited while lighting the lamp. This prayer is also known "deepa shlokam".
"Subham Karoti Kalyanam
Arogyam Dhana Sampadah
Shatru Buddhi Vinashaya
Deepa Jyoti Namostute."
Meaning: The accurate meaning of the mantra is: "I fold my hands before the light that brings prosperity, auspiciousness, good health, abundance of wealth and destruction of the enemy's intellect". Here, Darkness symbolizes enemy's intellect and with the arrival of light, darkness disappears. Likewise, light (God's Grace) destroys darkness (enemy's intellect).
"Deepajyothi Parabrahma
Deepajyothi Janardhana
Deepo Me Hara Tu Paapam
Sandhya Deepa Namostute."
Meaning: The literal meaning of the mantra is: "I fold my hands before the lord, the maintainer of this creation, in the form of this light. I adore this light, which destroys all the pains resulting from my omissions and commissions".