Typically 3 blessings are recited during this eight-day (sunset to sunset) festival.
On the first night of Hannukah, Jews recite all three blessings, on all subsequent nights, they recite blessings number 1 and 2.
On the first night of Chanukah one light (candle, lamp, or electric) is lit on the right side of the Menorah, on the following night a second light is placed to the left of the first and is lit first proceeding from left to right, and so on each night.
The First Brachah. Barukh atah Adonai, Eloheynu melekh ha-olam, asher kid'shanu be-mitzvotav ve-tzivanu le-hadlik ner shel Chanukah. Praised are You, O Lord, Our God, King of the Universe, Who sanctified us with His commandments and commanded us to kindle the Chanukah lights. The Second Brachah. Barukh atah Adonai, Eloheynu melekh ha-olam, she-asah nisim la'avoteynu, ba-yamim ha-hem, ba-zman ha-zeh. Praised are You, O Lord, Our God, King of the universe, Who performed wondrous deeds for our fathers, in ancient days, at this season. The Third Brachah. Barukh atah Adonai, Eloheynu melekh ha-olam, she-heche'yanu, ve-kiy'manu, ve-higi'anu la-zman ha-zeh. Praised are You, O Lord, Our God, King of the universe, Who has kept us in life, sustained us, and enabled us to reach this season. After kindling the lights, the Hanerot Halalu prayer is recited. HANEIROT HALALU - THESE LIGHTS.... Haneirot halalu anachnu madlikin Al hanissim ve'al haniflaot Al hatshu-ot ve'al hamilchamot She-asita la'avoteynu Bayamim hahem, bazman hazeh Al yedey kohanecha hakdoshim. Vechol shmonat yemey Chanukah Hanerot halalu kodesh hem, Ve-ein lanu reshut lehishtamesh bahem Ela lirotam bilvad Kedai lehodot u'lehalel leshimcha hagadol Al nissecha veal nifleotecha ve-al yeshuotecha. We light these lights For the miracles and the wonders, For the redemption and the battles That you made for our forefathers In those days at this season, Through your holy priests. During all eight days of Chanukah These lights are sacred And we are not permitted to make Ordinary use of them, But only to look at them; In order to express thanks And praise to Your great Name For your miracles, Your wonders And your salvations.