Some detailed information please

[Cainite]

Meditation doesn't necessarily always include inducing trance. but getting into trance often requires some form of meditation. different methods are there.. our folk musicians start improvising and progress until they get into such states and they keep going. (not many of them can do this skillfully though)

Meditations for different purposes don't include going into a trance. Visualization, contemplation or healing, ...

The difference between light or deeper trance is how deep one can go into trance. I think it's simply manipulating the frequency of brain waves.

State Frequency range State of mind
Delta 0.5Hz –4Hz Deep sleep
Theta 4Hz–8Hz Drowsiness (also first stage of sleep)
Alpha 8Hz–14Hz Relaxed but alert
Beta 14Hz–30Hz Highly alert and focused

The goal is to get closer to those states that are similar to sleep/dreaming, but keep the conscious mind awake.

I hope I'm not wrong.