You have a space of 1.9x1.4x1.6 ft which is length, width, hight. If you only have around 1.5' of hight, you will need to induce flowering, I would say when plants are around 4'' high. You can get a longer veg period doing LST. I would reccomend doing this and veg as long as you can, so to let the plant mature as much as your space will allow. Start flowering cycle when your space is 33% full. Hard to tell with out pics of your cabinet.