power outages dont cause hermi's , what causes hermi's is when the user doesnt let the plant sleep enough hrs(12). If u have a power outage, then turn back on the light (not letting the plant have a full 12hrs of darkness), it causes the plant to hermi. But power outages themself dont cause hermis. Its the fact that i made a mistake and turned the light back on after 2 hrs of darkness during the flowering stage.