moo repliedWhen to Light:
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The menorah should preferably be lit immediately at nightfall. It is best to wait, however, until all the members of the household are present. This adds to the family atmosphere and also maximizes the mitzvah of "publicizing the miracle."

*The menorah can still be lit (with the blessings) late into the night, as long as people are still awake.*

The menorah should remain lit for at least 30 minutes after nightfall, during which time no use should be made of its light.

brandlet repliedyes. Light it after sundown. But, if you can't do it so early it is OK to light it even late at night.