The answer to 'lifespan of surge protection' is that a properly installed and maintained surge protector can last 5-10 years on average. Surge protectors are designed to absorb and dissipate electrical surges, which degrades the internal components over time. Factors like the frequency and severity of power surges in your area, as well as the quality of the surge protector, can impact its lifespan.
It's a good idea to inspect your surge protectors periodically and replace them if they appear damaged or are no longer providing effective protection. Many surge protectors also have indicator lights that can alert you when they need to be replaced. Proper maintenance and replacement of your surge protectors can help ensure your valuable electronics are protected from damaging power surges.