I would unplug lights and timers and wait until power gets back on.
If it's back and its still early just adjust all timers and switch the lighs on again.
If the power is back and it's close to lights off just wait until tomorrow.
If it gets to cold you need to provide a heatsource but I don't think that will happen unless you're on Alaska.
I'm in the UK I just don't want them to get to cold in the day time tomorrow if it's still out I was thinking of a hot waterbottle ontop of the vivs what heat source would you recommend