This search might help to clarify:
Six Lamps and Four VisionsIt is said that everything we experience is nothing but the Five Lights; although that we only perceive everything as the 'solid matter' of the five elements, due to our habituation to karmic and impure vision.
I've recently posted the following excerpt by Vajranatha, which hints at some of this:
http://vajranatha.com/excerpt/BonpoBookoftheDead.htmAnd in
Skydancer: The Secret Life and Songs of the Lady Yeshe Tsogyel, Keith Dowman wrote something to the effect that a Dzogchenpa's (presumably who has completed at least the First Vision) everyday Vision would look like a hallucinogenic trip (i.e. we would begin to perceive everything as the Five Pure Lights of the Basis, as opposed to how everything appears to ordinary deluded vision as the 'solid matter' of the five elements) to ordinary people.
And I think that it's debateable regarding whether there are actually six or seven colors in the
ordinarily-visible light spectrum. So Six (or Seven) Lights makes sense considering that. Some Occult traditions speak of Seven Elements and/or of Seven 'Rays'. So I've always wondered if mesoterically there are Five Dhyani Buddhas and esoterically there are Seven Dhyani Buddhas. The Five Dhyani Buddhas are all within the Sambhogakaya, so maybe the Dharmakaya and Nirmanakaya are each a Dhyani Buddha in themselves, making 'Seven Dhyani Buddhas' total.
Seven Dhyani Buddhas and "Elements" mentioned in H.P. Blavatsky's The Secret DoctrineThis probably doesn't quite answer your question about the Six Spaces or Dimensions of Samantabhadra though....
SARVA MANGALAM
Without clairvoyance, we cannot work for other sentient beings - Khunu Lama
Suddenly you will know the different knowledge without study - Thog-'bebs
One may now accomplish the welfare and instruction of all sentient beings, spontaneously and without effort, by simply being, that is to say, by manifesting one's enlightened nature through spontaneously emanating an infinity of Nirmanakaya manifestations - Vajranatha