The answer to your question about light is very easy. Light is God, in fact everything that you have ever seen and have ever known is God. Everything that is, is God. "I am the alpha and the omega, the beginning and the end." God is everything that there is, was and will be.

God is not a being , he is an energy. This energy is what makes up everything, and we are all part of this energy. There is no reason to worship, just be.

When you die the energy that you are made of flows back into the system and unites with the energy of the universe. This energy is what we call God.