Lighting and power out help +rep

Recently the power company was installing a new transformer by my house and the power was off for about an hour and 20 mins, during my crops 18hrs lights on. Is their anyway this could have negative effects on my plants?
My plants are only seedlings only 4-5 days old and their on a 18/6 cycle.

I also have 1 more question For you guys.. Every once in awhile (not often at all) my electric may go out and back on in a matter of 1-10 seconds. And I know when I turn my ballast off and back on my 1000 watt metal halide it won't turn on, I have to let it cool for about 20 mins till I can turn it on.
So what I want to know When this happens an the electric comes back on should I just leave It alone and let the ballast run by itself, will the light automatically come back on when it has cooled? Or when this happens should I just manually turn everything off and wait 20mins till the light has cooled then turn it Back on? Cause sometimes I am not always around and might not catch this.

I really need help on this and thx in advance!

I would be more worried about he power fluctuations and continues on/off cycles blowing your Mh bulb.
If its often enough, this will light stress your plants. Though one hour once, nothing detrimental.
But that 20 min thing, if that happens more than once a day I'd be worried.

An hour or so is nothing....even a day, is OK. I imagine the light cannot come back on by itself. And it is an easy test.

Turn on light, let it stabilize. Then pop the circuit breaker to simulate a power out. Then after a time, turn back on the breaker and go observe the light.

The question is what happens if the power is only off for 2 minutes. Can the ballast restart the light? You have already said it can't. So, if you can catch it within a few hours you will be OK, I think.

Good luck.

interruption of light cycle during veg shouldn't harm much. not ideal, but not really the problem it is during flowering, and then it's usually the interruption of the dark cycle that causes problems. Headie's right that the stress to yer bulb is more of a worry - yes I would manually shut it off and give it at least a half hour before firing it back up.