if not read up,
take the new growth at a node, and cut off the growth. this will cause the growth of the node split into two, making two stems.
after the 4th node of these new stems, top it again.
they will split into two,
making 4 stems.
At the first topping, the two stems that start coming out use LST or tying the branches to keep the plant low. keep LST throughout this second branch, trying to achieve a nice even canopy, until the second topping.
after 1 or two weeks of this second toping, or after the second topping is healed, put the lights in 12/12.
this should make your plant have 4 main colas
and several smaller colas.....
you will also need more light.
get 2 more clamp lights, 4 more 42 watters, 2 y splitters, and an extender.
happy growing!