Q. How long is the time that the lights of the Menorah have to remain lighted?

A. Nitey Gavriel (31: 2) maintains that the time needed is measured in “Shaot Zemanios” namely that it varies according to the latitude of the place one is in. He adds that in the U.S. it would be approximately 45 minutes.

Horav Shlomo Miller’s Shlit’a opinion is that a half an hour during the correct time for lighting is enough everywhere.Horav Kalman Ochs Shlit’a quoted Horav Elyashiv that it should be until a half an hour after Tzeis Hakochabim.

Rabbi A. Bartfeld as revised by Horav Dovid Pam, Horav Aharon Miller, Horav Chanoch Ehrentreu and Horav Kalman Ochs Shlit’a