I'm all for a dark period and I usually hit 24-72 hours depending on when trimming best fits into my schedule. I didn't always do an extended dark cycle and I can't fit it into every harvest, but when I do the plants that have been in the dark always seem stickier. Just don't forget to keep your temp, humidity, and airflow monitored. My flower room never shuts down, so I have a controlled, dedicated dark room, but I have friends who just leave everything on but the lights and use their flower room for the dark period.
Looks nice!