Light symbolises wisdom as contrasted to darkness which symbolises ignorance. The offering of light to the Buddha reminds a Buddhist that the goal of Enlightenment is attained when wisdom drives away the darkness of ignorance.
With lights brightly shining,
Abolishing this gloom,
I honour the Enlightened One,
Who dispels the darkness of ignorance
So go ahead and make mistakes. Make all you can. Because that's where you will find success. On the far side of failure. - Thomas J. Watson, Sr.