Interruption of daytime light

I was taking care of things yesterday and had a localized power outage. this interrupted the lights for about 5mins. Would this effect the flowering cycle of anything? Mine were 2 weeks into the flowering cycle. If it will set things back, how long would that approx. be?

I don't think that should be a problem

Plants are slow in response their environment, you should be ok. Maybe next time use a high watt UPS for these little outages. btw You should wait at least 30 min for the ballast to cool before firing it up again after an outage.