id do 18/6
the dark time allows for better root growth
Ahmen.!!! You really should give your young plants.. while in veg.. you should give them a light schedule such as 18/6.. in order to give the roots & plant some time to relax.
Then again.. some plants actually require 24/7 of light for the first few weeks.. I think. Not sure on that.. but I think I remember someone talking about this before... and mentioning something about some strains actually require and need 24/7 constant light for the first few weeks of veg... then can be brought down to an 18/6 schedule.
I personally.. never give my plants 24/7 of light.. since I am a firm believer in giving the plant dark cycles in order to let their roots get nice and healthy... and also.. you need to let your plants complete their cycle of Photosynthesis.
But than again.. I've never tried 24/7. But then again.. I don't need too! hehehe...
good luck everyone.
peace.