AUTOFLOWER FLOWERING PROBLEM AND LIGHT CYCLE.

Hi Forum im new here and i have been growing some Northern light auto flowers by greenhouse seeds.
I started them on 18/6 light cycle and are looking really healthy and bushy at 6 weeks old. but they was not flowering so i put them on 12/12 to flower 3 days ago. they have started flowering now.

my question is should i leave them on 12/12 for a while or all their grow or could i switch them back to 18/6. i don't really want to loose any yield? also when i turn of the lights for the night cycle my humidity has been going to 80% or above, but in the day its around 50-60%. is this a problem. Thanks in Advanced.

My setup
.600w hps
.coco perlight medium
.PH 6.0
temps 26c day 20c nights
well ventilated grow area
feeding them with Canna A&B

AUTOFLOWER FLOWERING
light 20/4 all the way veg. flower
get a dehumidifier 40%

greenhouse seeds are a bunch of conmen fyi
probably not autos, you could try and go back to 18/6 but if they arent autos that coulld make them reveg or worse hermi up on you best to finish out 12/12 imo

Greenhouse has some decent strains. Their autos are not stabilized and they suck.. Keep it on 12/12 and let it run from there.

Leave it at 12/12 to get more weight. Im not sure about autos, too small for the risk your taking and im yet to hear about an auto that smokes up.

Cheers Guys Guess ill leave it on 12/12