The flames should burn for at least 50 minutes in total, and for at least 30 minutes after Tzeit Hakochavim (whichever is longer).
If a flame extinguished during this time, it is appropriate to relight it (without reciting the Brachot).
During this time, the Chanukah flames may not be used for any purpose. This includes using a flame to light another Chanukah flame or the Shamash.
Similarly, benefit may not be derived from any of the light generated by the flames. This is one of the reasons why the Shamash flame is placed higher than the other flames, in order that any inadvertent benefit may be attributed to the Shamash. Nevertheless, one should not rely on the Shamash, and instead ensure that the room is well-lit.
The Menorah should not be moved during this time.
It is customary for women and men to refrain from any labor (i.e. sewing, knitting, laundering or ironing) during this time. It is also preferable to avoid leaving the house to go shopping, or the like.
One should sit by the Menorah for at least half-hour, and utilize the time for learning, or for Chanukah inspiration.
After the flames have burned for the required amount of time, the Menorah may be moved, even if the flames are still burning. Similarly, at this time, women may perform labor outside the view of the burning flames.
Even after the required amount of time has passed, it is still inappropriate to derive benefit from the flames or to extinguish them (unless leaving them unattended would create a safety hazard).
During Chanukah, the Menorah should not be used for any other purpose. Similarly, after the Menorah flames are extinguished, the leftover wicks and fuel should not be discarded or used for other purposes. Instead, it should be kept until the last day of Chanukah.
