That there is actually a light emitted by the divine world of being is indicated by the following excerpt from, I believe, a Mahayana Buddhist: "There are four successive stages of piercing in reality, identical in sleep and dying. The first, `Revelation,' is experienced in the earliest period of sleep, and appears as a moonlit cloudless sky. The Drowsiness deepens and `Augmentation' is reached. It appears as brilliant clear sunlight. Few can go beyond this into the third stage, `Immediate Attainment.' Here there is total darkness. It vanishes when sleep gets deeper still; then the Void is penetrated, called `Innate Light,' the first clear radiance. The student thus passes into Reality and Enlightenment, whether in the nightly death of sleep or the end of human life."
-- Notebooks Category 22: Inspiration and the Overself > Chapter 4: Introduction To Mystical Glimpses > # 181