Q. See question above. One must take into account that following regulations and insurance policies, no live fire should be left on inside the premises, and since people rush to go home to light their candles and must turn off the shul Menorah.
How long do the candles of the shul or beth midrash have to remain lighted before the last person leaving can turn them off?

A. Horav Shlomo Miller’s Shlit”a opinion is that one should try to keep the normal half an hour. In need one may in a shul only turn off after 15 minutes.

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