This is a DWC small grow box, AN nutrients, 200w CFL single bulb, and I wanted to do a micro grow, or realized that I could because they were so strong and healthy as soon as they germinated. They are in 3" net pots. So I switched them to flower at around the beginning of week four, and there was like a 2 to 3 week transition period: the C99 and the WW showed pre-flowers in 2 weeks, the the two BDs did in 3 weeks. They are the prima donnas and will take their own sweet time.
SO, to answer your question, the C99 and WW are in week 5 and the BDs are in week 3--more or less. C99 is just a beast: she is covered in triches, even up onto the fan leaves. Crazy genetics!!! and a real pleasure to grow. She really wants to please. And WW is also a very good girl. The other two are prima donnas as I said above.