I have experienced this 'central light'. I have only experienced this from higher doses of DMT. I feel like anything beyond this light just becomes an overwhelming whiteout experience and I will remember next to nothing.
If you are right in the zone to be able to experience this central light, it does make everything else move to the background. It becomes something that envelopes you completely and entirely. What I felt was love, the sensation of warmth and rocking like a baby. Whatever this light was it loved me with all of it's being. I had never felt love like this before in my entire life. I didn't know that such love could be experienced like that. It was truly amazing!
All of these feelings of love washed over me and it felt like I was having some sort of conversation but I could not distinguish it's voice from my own voice in my mind. It felt like I was it and it was me. I no longer felt like I was me. A strong ego-death.
I will always remember these feelings and the thoughts it placed in my mind. It snapped me out of some really bad times in my life to be honest. It's like I suddenly could no longer think about the world I live in the same ever again. A true change in perception. I wish I could serve this 'central light' on a silver platter for everyone who wanted it.
This light was the most intelligent 'thing' I have ever experienced. It was the brightest. It was the most positive and transformative experience of any psychedelic journey I have ever taken. It was beautiful!
"In the universe there is an immeasurable, indescribable force which shamans call intent, and absolutely everything that exists in the entire cosmos is attached to intent by a connecting link." ~Carlos Castaneda