I have a brooder heat lamp that with reluctance I used for the last 5 days during an extreme sudden cold snap with temps around 10 to 12 at nite and only up to 20 during day. I am turning it off today. I am using an outdoor extension cord which ends in a gfi plug at the house. Should I use a surge protector up at the coop as well? I have a heated watered so that is plugged up all winter.