I've tried doing 24 hours of complete darkness and didn't notice anything. I usually chop a couple hours before the lights turn off just because of the time I get to tend my garden. I'm curious to who has cut just after the lights turned on or in the middle of the light cycle. I always thought that at the night the plants send sugars down to their roots so it would be better to harvest when the lights are on.
Because of the low capacity for real discussion i forget a lot of stuff and its never covered but im pretty sure that theory was disproved and simply hanging the harvested buds reset the thc or somthing similar i refuse to google on.The theory is light degrades THC and the levels are highest right before the lights come on. Not sure how much difference there is, I am sure it's probably very minimal.