Bud at 10" high

[Cobus]

mmm you need to do some readin my friend. vegetative(normal growing) cycle should be 18 on 6 off.
flowering cycle should be 12 on 12 off, 8 is going to make them flower and maybe hermie.
not sure what an 8 hour cycle will produce exactly.

I have done this once before an i ended up with a 2 foot tall plant. When it was done i had a giant christmas tree bud that weighed just over a pound.