does anybody know more about the history
From a Greek site:
“This ceremony takes place in the Orthodox Church of the Resurrection in Jerusalem in such a way that bewilders the soul of the Christians.
On Easter Saturday, at noon, the Orthodox Patriarch, or any other Orthodox Archbishop, enters the Holy Sepulchre, recites special prayers and remains waiting. Sometimes the waiting is long, sometimes short. The crowd, in the darkened church, repeats continually with a loud voice: “Lord, have mercy.” (Kyrie eleison). At a certain moment the Holy Light flashes from the depth of the Holy Sepulchre in a supernatural way, miraculously, and lights up the little lamp of olive oil put on the edge of it. The Patriarch (or the Archbishop), after having read some prayers, lights up the two clusters of 33 candles he is holding, and begins to distribute the Holy Light to the multitude of pilgrims, who receive it with great emotion, accompanied with the pealing of bells, acclamations, and an unbridled enthusiasm.
The Holy Light is not only distributed by the Archbishop, but operates also by itself. It emits from the Holy Sepulchre having a gleam of a hue completely different from that of natural light. It sparkles, it flashes like lightning, it flies like a dove around the tabernacle of the Holy Sepulchre, and lights up the unlit lamps of olive oil hanging in front of it. It whirls from one side of the church to the other. It enters to some of the chapels inside the church, as for instance the chapel of the Calvery (at a higher level than the Holy Sepulchre) and lights up the little lamps. It lights up also the candles of certain pilgrims. In fact there are some very pious pilgrims who, every time they attended this ceremony, noticed that their candles lit up on the own accord!
This divine light also presents some peculiarities: As soon as it appears it has a bluish hue and does not burn. At the first moments of its appearance, if it touches the face, or the mouth, or the hands, it does not burn. This is proof of its divine and supernatural origin. We must also take into consideration that the Holy Light appears only by the invocation of an Orthodox Archbishop. EACH TIME THAT HETERODOX BISHOPS TRIED TO OBTAIN IT, THEY FAILED.”