Turning stuff off doesn't help. Lighting strikes will arc past power strips, fuses and simple switches.
You need a pretty robust power interrupt circuit to guard against a lightning strike. A home depot power strip doesn't qualify. Also, today's sophisticated reef gear uses a lot of IC components that can't take high voltage surges like a good old magnetic ballast could.
For a home the best protection is a proper ground circuit with heavy copper grounding to earth. Apartment buildings and condos tend to distribute high voltage spikes reducing the odds of your stuff getting nuked because there's so much other stuff on the circuit that's a more tempting path to ground.
Still, if lightning bolts are smacking flag poles down the street I would treat your reef gear like your computer. Physically unplug those $1200 worth of Radions from the wall until the sirens stop blaring if you want to be safe.
I'm not am electrician, but worked with at of them in data centers and listened to them.