Don't forget to filter your cable
In addition to the excellent advice given above, I recommend buying surge suppressors that have a high Joule rating (how much energy it can absorb). I also recommend that you get suppressors that have inputs and outputs for coax cables where you have devices like modems and TVs. Lightning can hit your cable box and enter your house that way.
I also recommend going to Pike Electric to get the whole house suppression; they are cheaper than SECO. Don't forget that your appliances are essentially computers and have sensitive electronics in them. I've had some terrifying lightning strikes nearby and have had no problems over the few years since I had it installed.
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