Enlightenment in Astrology

Enlightened means you have realized who you are. Enlightenment is becoming aware of yourself.Enlightenment simply means an experience of your consciousness unclouded by thoughts, emotions, sentiments. When the consciousness is totally empty, there is something like an explosion, an atomic explosion. The  whole insight becomes full of a light which has no source and no cause. And once it has happened, it remains. It never leaves you for a single moment; even when you are asleep, that light is inside. And after that moment, you can see things in a totally different way. After that experience, there is no question in you. Enlightenment is nothing but your becoming light, your inner being becoming light.

The physicists say that if anything moves with the speed of light, it becomes light—because the speed is so great that the friction creates fire. The thing is burned, there is only light. The material disappears, the only immaterial light remains.

Enlightenment is the experience of an explosion of light within you.

Perhaps the  desire to be enlightened is moving with the speed of light, like an arrow, so that your very desire, your very longing becomes a flame, an explosion of light. There is nobody who becomes enlightened, there is only enlightenment. There is only a tremendous sunrise within you. 

Hundreds of mystics describing it as if suddenly thousands of suns have risen within you. That is a common expression in the mystic's language, in all languages, in different countries, in different races.

Parameters :

4th/8th/12th house lord : Moksha houses , Moksha houses represent release of attachment to --
creative intelligence (4th house),religious virtue (8th house ),bodily form and social identity (12th house )
Sun: Sun is the source of our Inner Light. The Soul Essence 
seeking to shine through into the world. It is the power which illumines our experiences and the source from which we survive, thrive and grow.The Sun is not just the “Soul” but is also the Inner Fire of Truth which burns away and purifies the False Sense of Self. It burns away the attachments we have formed through various lifetimes
Moon :represents sensitivity, instinct, the unconscious, and the way you deal with your emotions, your part of femininity, your daily moods, your imagination, and your intuition.Moon  also said to represent the instinctual self; the self that is commonly more hidden than the one we show to the world,  Mentalinclination 
Ketu : Ketu  is a planet which represents isolation, separation, spirituality and reaching the state of nothingness in life. That's why it represents Moksha too. 

Combinations :

1. Sun, Moon, and Ketu sitting  in 4th/8th/12th house represent enlightenment .
2. This yoga occurs when Sun, Moon and ascendant lord along with Ketu are in 1st, 8th or 12th house. This is the yoga of a person who is living their last physical life and will gain access to the higher  dimension. 
3. Ketu (a planet which represents Moksha) sitting in Moksha houses (4th, 8th or 12th),  gives the person some highly spiritual experiences in life.
4. Ketu in 12th house in natal as well as in Navmansh chart  represents last birth, moksha or salvation .

Case Study 

• The native is having Moon and Ketu in 4th house.
• Lord of ascendant Sun is placed in 12th house .
• Sun is sitting in 12th house .
• Ketu is aspecting 8th and 12th house. 
• Though there is not a clear indication of moksha in natives'  life  but  definitely he will achieve some higher state of  consciousness or mysticism in this birth.