Well, i think it has something to do with the type of lighting as well. With HID lights, 18/6 is reportedly excellent. With fluorescents and CFL's, higher longer light exposure works well. It would make sense seeing as how there is a great diff. between the lumen outputs of the above mentioned.
ToKnoIsToGro Reviewed by ToKnoIsToGro on . 18 or 28 hour day ??? what about it folks... any input??... what about growing plants under an 18 or 20 hour day.... instead of 24.. Rating: 5