Does Heaven Light up with the Laughter of Imam Ali (A.S) and Hazrat Fatima (S.A)?

There are many reports indicating the privileged position of Imam Ali (A.S) and Hazrat Fatima (S.A) in Heaven, and only one of them is the subject mentioned in the question.

It is narrated by Ibn Abbas who said

"After the people of Paradise have settled in Paradise, they will see a light that makes Paradise brighter. They ask God: You said in the Qur'an that the people of heaven do not see the sun there; [1](Then where does this light come from?!) They answer them: This is not the light of the sun and the moon, but the light of Ali (A.S) and Fatima. (S) They laughed and heaven became brighter from the light of their laughter".[2] 

This narration has been narrated in some Shia and Sunni sources, but without mentioning the document; but since the mentioned narration is found in authentic books and there is nothing in its content that is not compatible with rational and religious standards; it can be accepted.

But about what kind of light this light is, we can raise possibilities:

1. It is possible that the meaning of light is not sensual and material; because just as lights illuminate dark objects to see, and everything becomes visible through them; they (PBUH) are also finders of truth and truth, enlighteners of facts.

2. Just as God is the light through whom the heavens and the earth have appeared, and there is only one light in the world, and that is the light of God, they (PBUH) are the manifestation of God's light in heaven.

3. Even if the meaning is a material light, it still does not contradict reason and Sharia; as examples of it occur in this world. Like when nuclear interactions happen in the sun and light is created, or light is created from the collision of two clouds in the sky and illuminates the earth and...

References:

[1] Man, 13.

[2] Sheikh Sadouq, Amali, pp. 261-262, Beirut, Alami, fifth edition, 1400 AH; Thaalbi Neishabouri, Abu Ishaq Ahmad bin Ibrahim, Al-Kashf and Al-Bayan on Tafsir al-Qur'an, vol. 10, p. 102, Beirut, Dar Ihya Al-Tarath al-Arabi, first edition, 1422 AH; Rashid al-Din Meibdi, Ahmed bin Abi Saad, Kashf al-Asrar and Kait al-Abrar, research, Hikmat, Ali Asghar, vol. 10, pp. 322-323, Tehran, Amir Kabir, fifth edition, 1371; Ibn Shahr Ashub Mazandarani, Manaqib Al Abi Talib (a.s.), vol. 3, p. 329, Qom, Allameh, first edition, 1379 AH.