At 7 weeks indoors and just found the first preflowers. I've been running the lights at 18/6 and holding back on the 12/12 to make sure the clones have taken.

I thought that she wouldn't get preflowers until I was into 12/12 light. So I changed to 12/12 last night as it seemed pointless leaving her on 18/6 if she has already started to flower. Am I doing the right thing here?