The light show is like when you are leaving or entering the earths atmosphere, it is part of access level concentration. A lot of people take the lights and pretty patterns too seriously or get lost in the bliss that is part access concentration.
For this type of meditation my teacher told me to be the witness, just watch. Which I figured is don't be scared and run away when the pain got really bad or don't cling to the pretty lights and bliss. Sunim was right, the lights are just friction...but there are special lights, little nimitta lights that are like portals if you are steady and grounded in equanimity they take you to new levels of the mind to walk through and let go...eventually there are no more levels and things settle down, sitting becomes rock steady and you can sit for hours and it seems like minutes...
I remember you mentioned your Bali experiences, now I have to look up Ayahasca, I love all this information <3
My gold was upekkha in english means equanimity, a steady mind no matter what happens. I will take this state of mind to my death bed and watch what happens, hopefully I won't get lost in all the death sensations....;-)
Thats what I am trying to master : a steady mind! No matter what bullshit happens around me and there are a lot of those energy vampires interrupting my flow. Upekkha! Nice! Very nice!
I think I did mention ayahuasca in this article but only on the side.
https://steemit.com/healing/@mammasitta/sacred-plants-and-natures-vaccine-why-do-i-believe-in-healing-with-kambo-frog-medicine