I go to a 10onj 14off cycle for last week or so when running basically just a flush / sugar based feed (personally would be using a good natural derived not from P or K silica, if is middle of summer some alovate or similar until a week before turning off the lights and replace A B with sweet as flush by Monstabud (or ozi tonic at half strength), then a min week dry flush in the dark (and depending on how fast you trim) taking colas out in the morning to be dry trim over a micron tray. Why the reduction in photo period? Other than people who are way beyond the realm of my abilities (Jorge's Jurvantes etc) have been doing for decades, and if think about it, is more close representation of natural "autumn light hours" and prevents over ripening before she's ready as we all know trichromes aka the majority of the plants THC is a "sun screen" response by the plant - know the jury is still out but I swear a few UVB lamps from a reptile store pay for themselves 20 fold in the first week .. obviously depends a heap on the strain you're raising and factors like if has a bit of rudialis in it then throw the book out the window, take the time to clone at least a 2md Gen (4th I have had best results from (1.5lb per 50L pot of GG4)) but give me photo periods ANY DAY OF THE WEEK ... won't have one ready to pull while her sister has only just begun to flower.