Yeah I mean you look at your plants and you say "these are ready to harvest now" and then you simply plunge them into uninterrupted darkness for 24-36 hours and when you open the tent back up you harvest immediately. Supposedly it makes more terpenes come out and helps with smell and taste. I have a few friends who grow who swear by it and one who thinks it complete garbage, lol. When I researched it myself, fairly thoroughly, it seems to be one of those things you get a 50/50 kind of response on. I couldn't find anyone who had done an actual side by side test via whatever means and reported on it, I was hoping someone here might have done that experiment.