First you need to define "who" the Light is. Start with the Creator of the Universe.
Matthew 6:23 If then the light that is in you is darkness, how great is the darkness!

Most "enlightenment" articles are really just intellectual constructs, filled with metaphysical darkness.
Proverbs 14:12 There is way which seems right to man ("enlightenment") but the end thereof is death.

If "enlightenment" was truly in the earth - there would be immortals. So far, everyone has died.