youve planted a seed, waited for it to sprout and thrown it straight into 12/12 lighting without time for veg? not gonna get anythin there im afraid...
looks to me like you have enough room for at least 3 weeks veg on each. defo be worth it come 'harvest' time. if i were you, id pack in more lights, veg for another couple of weeks using lst, then flower. as someone already said, itll be pretty much pointless otherwise. lucky to get a joint...