Shit Happens! But it wont be a total waste. Since you have allready started flushing, and they are still pretty green, I would continue flushing for a total of 2 weeks, atleast another 5 days and re-analyze. Do you have a magnifying glass to check the Trichromes? That is really the Main thing I use to determine when to Harvest. You dont want to harvest until the majority of trichs are Cloudy to Amber. I will try your 36 hours dark period at the initiation of Flowering. I have had great success with 4 days dark at the end of the grow while I flush. It is amazing about the amount of new bud growth, and new white hairs emerging. I may even experiment with going longer, perhaps up to a week and journal it with pics. I would guestimate about 15% -25% increase in bud size in 4 days. I say 4 days dark, but I do usually plug in a 105w CFL in the outlet for about 1 hour per night so I can check ph/ppm/problems with the system and check for bugs. It may have something to do with the insane growth in such a short period of time. The Majority of your plants looks normal, so just go about your plan as usual. Harvest after a good flush and after most all of the Trichs are no longer clear. Harvesting when most trichs are cloudy can result in a more heady/social buzz, and the more amber resulting in more couch lock. But you never know, some strains will be the same either way. Good Luck!
+rep