"Light" symbolizes the light of wisdom
Lighting the lamp is in terms of Dharma
1. Light up the wisdom of our own nature
2. Light up the light of our hearts
Our buddha nature is covered by greed, anger, delusion, and defilement.
Lighting a lamp is actually a beacon of our own nature. Of course, if we are virtuous, we will be bright, but we know that we are completely powerless, and we must use the lamp of Buddhism to light up our self.