Different varieties require different photoperiods to flower. Outdoors, you aren't really forcing flowering, just waiting for the plant to respond to the change in photoperiod to cause a hormonal response that induces flowering. Indoors, most people use 12/12 to force flowering. No where in nature does it go from 24 hours or even 18 hours of light, to suddenly 12 hours of light within a 24 hour span. This is sufficient to force most hybrids, and even most landraces. This is not always the case though. Sometimes this isn't enough and plants need 13 hours of dark to induce a strong hormonal response, but this is rarely the case. There are other examples of strains requiring different photperiods to get the job done. I am not familiar with Iranian Autoflower but it doesn't sound like a true autoflowering variety. I would be interested to see what happens indoors. I've noticed they don't recommend it for growing indoors. I wonder why. I mean, if it's a compact, autoflowering variety, why couldn't you grow it indoors?