Natural gas prices are high and although these lights are charming, they are very costly. My suggestion is to disconnect the gas line at the meter and have an electrician rewire the light pole to use an electric bulb. A surge protector is a generic term for either a surge arrestor or a surge suppressor. Let's talk about those. Surge arrestors are generally mounted inside your electrical panel and provide a layer of protection against voltage spikes which occur from the outside.
Surge suppressors are a second stage of an interior defense system.
These are what you are used to seeing sold for computers and televisions. They sometimes resemble small power strips. Keep in mind that there are vast qualitative differences on surge protector products. Generally speaking, the more you pay, the better protection you will receive. I read that you had considered this in the past, but it fell through.