From Share International:
Q. Is it my imagination or is there an increasing number of patterns of light? They seem to be everywhere! A. You are quite right. They are increasing so that they are now seen in almost every country in the world.
Sounds to me like the (S)elected President of Iran is quoting from this site.
Ahmadinejad is just reciting standard hadith boilerplate about the Mahdi. Ahmadineja even claims to be able to send the Shi'ite Mahdi messages by dropping notes down a sacred well.
Iran's Gov't Seeks Agreement with 12th Imam - in hiding since 13th century?