We’d need to look at how far the lights had gone out – if its only a street then its possible that a cable under the ground has got a fault and switched off, that would be fixed by the local electricity supplier.
If it’s a wider blackout – a few streets, a whole town or a whole country then thats where I’d come in! Again, you’d have to work out how far the blackout was and come up with a plan as to how to get the lights back on.
If it were a Black Start then there would be a lot of information gathering to see what had happened, and a plan would be carried out to make sure the lights (and heating if electric!) were back on asap!
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