It wont hit 12/12 till late September. Trust me your plants will be showing over the next month. Genetics plays a role too. I'm not saying light doesn't matter but they show way before 12/12/ Remember indoor gardens don't veg. their plants as long as they are outdoors. Many people have them getting midnight sun like light exposure and they veg. fast in a month or so and then they hit the switch. Little different outside. Your plants are getting old and I'm sure that is a contributing factor. Just the same the strip tease will be more provocative in the next 2-4 weeks.