FAQs- Frequently Asked Questions How do I perform a power quality audit of my home or business? Why do my lights go off, come back on a few seconds later and then go off again? What do I do about protecting my home appliances against lightning and surge damage? What is the first thing I should check in my home regarding protection against lightning and surge damage before putting in any surge protectors? Will a surge protector prevent damage to my computer due to lightning? How can I protect my computer and other home electronics from lightning? What is the difference between a voltage transient and a voltage sag or swell? What is the difference between a TVSS , a UPS and a SPS? Do I need a "hard-wired"(a.k.a. Main Panel) and/or a "plug-in" surge protector? Where is the best place to put a surge protector? Plug-in? Hard-wired? How do I compare different surge protectors? How do I select a UPS system? What appliances and home electronics/entertainment equipment should I protect from surges? How do I know when a surge protector has gone bad or burned up inside? My computer crashes unexpectedly on clear, sunny days. Could this be power-related? What should I check? What is UL1449?