How many “nights” are there ALWAYS going to be in ONE moon cycle?
The moon cycle, from one full moon to the next, is not a fixed duration. It can range from about 29.27 to about 29.83 days. The long-term average duration is 29.530589 days. The number of nights would depend on what time it was at your place at the first full moon, how long to the next full moon, and how long the nights were. You might have 28 nights, you might have 29 nights.