What Yash experience is this description :
Obhasa (illumination)
Obhasa is the first defilement of insight.
The meditator may be aware of the following manifestations of light:
He may see a light similar to a firefly, a torch or a car headlamp.
The room may be lit up, enabling the meditator to see his or her own body.
He or she may be aware of light that seems to pass through the wall.
There may be a light enabling one to see various places before one’s eyes.
There may be a bright light as though a door had opened. Some meditators lift up their hands as if to shut it; others open their eyes to see what caused the light.
A vision of brightly colored flowers surrounded by light may be seen.
Miles and miles of sea may be seen.
Rays of light seem to emit from the meditator’s heart and body.
Hallucinations such as seeing an elephant may occur.
Piti (Joy or rapture)
Piti is the second defilement of insight. There are five kinds of piti.
1. Khuddaka piti (minor rapture)
This state is characterized by the following:
The meditator may be aware of a white color.
There may be a feeling of coolness or dizziness and the hairs of the body may stand on end.
The meditator may cry or feel terrified.
2. Khanika piti (momentary rapture)
Characteristics of this piti include:
Seeing flashes of light.
Seeing sparks.
Nervous twitching.
A feeling of stiffness all over the body.
A feeling as if ants were crawling on the body.
A feeling of heat all over the body.
Shivering.
Seeing red colors.
The hair on the body rising slightly.
Itchiness as if ants were crawling on one’s face and body.
See also the Sixteen Types of Insight Knowledge (Vipassana Nana) in Theravada Buddhism