Growing in soil underlights

Hi all can you grow in soil underlights lights using 18/6 time frame?
Umm yeah, it's called vegetative growth unless you have an autoflower strain. Photoperiods generally require a 12/12 cycle to flower.

Do a little reading man. It's basic.
 
Umm yeah, it's called vegetative growth unless you have an autoflower strain. Photoperiods generally require a 12/12 cycle to flower.

Do a little reading man. It's basic.
Thanks can you use 18/6 during growth? What books you recommend?
 

 
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