All the religions believe light represents God. All the religious scriptures mention that too. In bhagavad gita God says that I am the highest of the high. I am never born nor do I die. I am absolute Knowledge, I am absolute purity, I am eternal light.  I am Infinite. I am omnipotent. I am an energy in the form of light. A very subtle point of light.    

 Now why just a point of light? 

God further explains that a point is infinite, has no dimensions, no measurements. Point is in-destructive and so am I...