Actually many people from different faiths have talked about the miracle, from muslims and persian zoroastrians to other Christians of different denominations like Armenians and Catholics. This is from the Pope's Urban speech calling the first crusade, writen by Baldric of Dol
>How precious would be the longed for, incomparable place of the Lord's burial, even if God failed there to perform the yearly miracle! For in the days of His Passion all the lights in the Sepulchre and round about in the church, which have been extinguished, are relighted by divine command.
https://sourcebooks.fordham.edu/source/urban2-5vers.asp