Did a light shine when the Prophet peace and blessings of Allaah be upon him was born?
Question

Is there any reality in that before getting birth rasool as pak sallah alai salam was there in the sky as a light or (star), if it is there then can you explain me this in the light of quran and ahadis.
Praise be to Allah.One of the signs of the coming of our Prophet (peace and blessings of Allah be upon him) is that when his mother became pregnant with him, she saw in a dream that a light came out of her that reached Syria. 
It was narrated from Khaalid ibn Ma’daan that the Companions of the Messenger of Allah (peace and blessings of Allah be upon him) said: “O Messenger of Allah, tell us about yourself.” He said: “I am the answer to the prayer of my father Ibraaheem, and the glad tidings of ‘Eesa, and when my mother became pregnant with me, she saw something as if a light came out of her and illuminated the palaces of Busra in the land of Syria.” 
Narrated by Ibn Ishaaq with his isnaad; Seerat Ibn Hishaam, 1/166. Narrated with a different isnaad by al-Tabari in his Tafseer, 1/566, and by al-Haakim in al-Mustadrak, 2/600. He said: its isnaad is saheeh although they [al-Bukhaari and Muslim] did not narrated, and al-Dhahabi agreed with him. See al-Silsilah al-Saheehah, 1545 
Al-Tabaraani narrated that the Prophet (peace and blessings of Allah be upon him) said: “My mother saw in a dream that there came from between her legs a lamp that illuminated the palaces of Syria.” Classed as hasan by al-Albaani in Saheeh al-Jaami’, 224. 
Ahmad (16700) narrated from al-‘Irbaad ibn Saariyah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings of Allah be upon him) said… and he mentioned the hadeeth according to which the mother of the Messenger of Allah (peace and blessings of Allah be upon him) saw, when she gave birth to him, a light which illuminated the palaces of Syria. 
Al-Haythami said in Majma’ al-Zawaa’id: its isnaad is hasan. 
Al-Haafiz ibn Hajar said in al-Fath: 
When she gave birth there came forth from her a light which illuminated the house. This is supported by the hadeeth of al-‘Irbaad ibn Saariyah who said: I heard the Messenger of Allah (peace and blessings of Allah be upon him) say: “I was the slave of Allah and the Seal of the Prophets, when Adam was still in the form of mud on the ground, and I will tell you about that. I am the answer to the prayer of the father of Ibraaheem, the glad tidings of Eesa concerning me, and the dream that my mother saw and that the mothers of the Prophets saw. The mother of the Messenger of Allah (peace and blessings of Allah be upon him) saw, when she gave birth to him, a light which illuminated the palaces of Syria. Narrated by Ahmad and classed as saheeh by Ibn Hibbaan and al-Haakim. A similar hadeeth was narrated from Abu Umaamah by Ahmad. 
We should note that the evidence of the Prophethood of our Prophet Muhammad (peace and blessings of Allah be upon him) is not limited to this sign. Whether this is proven or not, his Prophethood is proven by definitive evidence which no fair-minded person can deny, rather those who deny it do so out of ignorance or arrogance. 
We ask Allah to cause His religion to prevail and His word to be supreme. 
And Allah knows best.