Regarding op,
There is no such thing as "lite jhana" or "hard jhana" in the suttas that is samma samadhi.
“If while he is walking, standing, sitting, and lying down a bhikkhu is free from covetousness and ill will, free from sloth and torpor, free from restlessness and worry, and has abandoned doubts, his energy becomes strong and unflagging, his mindfulness is alert and unclouded, his body is calm and undistressed, his mind concentrated and one-pointed. A bhikkhu who in such a manner is ardent and afraid of wrongdoing is called constantly energetic and resolute.”
Controlled while walking,
Controlled while standing,
Controlled while sitting,
Controlled while reclining,
Controlled in bending and
Stretching his limbs—
Above, across, and below,
As far as the world extends,
A bhikkhu observes how things occur,
The arising and passing of the aggregates.
Living thus ardently,
Of calm and quiet conduct,
Ever mindful, he trains in the course
Of calm tranquillity of mind.
Such a bhikkhu is said to be
One who is ever resolute.
- iti 111
There is no doubt different types of jhanas, but there is only one type of samma samadhi jhanas which is based on purification of thoughts..
This was said by the Lord…
“Bhikkhus, if while walking a sensual thought or a thought of ill will or an aggressive thought arises in a bhikkhu, and if he tolerates it and does not reject it, does not dispel it and get rid of it and bring it to an end, that bhikkhu—who in such a manner is lacking in ardour and unafraid of wrongdoing—is called constantly lazy and indolent. If while standing … If while sitting … If while lying down a sensual thought or a thought of ill will or an aggressive thought arises in a bhikkhu, and if he tolerates it and does not reject it … that bhikkhu is called constantly lazy and indolent.
“But if while walking … standing … sitting … lying down a sensual thought or a thought of ill will or an aggressive thought arises in a bhikkhu and he does not tolerate it, but rejects it, dispels it, gets rid of it, and brings it to an end, that bhikkhu—who in such a manner is ardent and afraid of wrongdoing—is called constantly energetic and resolute.”
Whether walking or standing,
Sitting or lying down
Whoever thinks such thoughts
That are evil and worldly—
He is following a wrong path,
Infatuated with delusive things.
Such a bhikkhu cannot reach
Enlightenment which is supreme.
Whether walking or standing,
Sitting or lying down,
Whoever overcomes these thoughts,
Delighting in the quelling of thoughts—
Such a bhikkhu is able to reach
Enlightenment which is supreme.
- iti 110