When using surge protectors, always plug in the expensive electrical devices with microprocessors like televisions, desktop computers, laptops, charging phones, etc. If you want to ensure they do not get damaged when there is a high voltage, plug them in. Other items like the light bulb do not need a surge protector. Instead, you can use it for high-end and high-voltage electronic equipment that needs protection from a sudden electrical power surge. We recommend plugging the AC units and refrigerators directly into the wall power outlet than a surge protector.