You won't get much of anything. Those pots do not drain well at all and it is likely that your plant will die of root rot before harvest.
But if you want to flower it in there, change the lights to 12/12 NOW to keep them as small as possible. They will still double or triple in size and choke each other out, and transplanting is an important part of keeping a rapidly-growing annual happy in a pot over time... transplant. Give yourself half a chance.