
There are nine candles in a Hanukkah Menorah because when the Maccabees took back the Temple, they only had oil enough for one day, and it takes eight days to make new burning oil. They lit the Temple Menorah and it lasted eight days. This is the reason it's called the Festival of Dedication (the meaning of the word Hanukkah), which is mentioned in the scriptures, John 10:22. It is when I believe Mary conceived Jesus via the Holy Spirit. Jesus, the Word, is Dedicated to us, the reader (a Son is given, Isa 9:6) from the Father above. The Festival of Lights because Jesus is the Light of the world. So...
Happy Dedication!
You can read a lot from this site (not mine):
http://www.hebrew4christians.com/Holidays/Winter_Holidays/Chanukah/chanukah.html