No. They will give you a few minutes every day.
My garden runs 24/7, I just move the plants in and out of a separate dark area twice a day. This takes a few minutes, and I am not having issues. In fact, I have two plants that I have been trying to hermie, and they aren't cooperating. I'm even hitting them with silver, skipping dark or light cycles, stripped them, and they still won't go. They look like shit, but they are stable.
There are a couple strains that are really hermie prone, and I've only seen 3 nanners on a plant that I was afraid to grow from past experience with it.