The short answer is yes—a power surge can indeed blow out your light bulbs. A sudden increase in voltage will overload the circuit and burn out the bulb at its weakest point, typically at the filament inside the bulb or within its wiring system. However, not all bulbs are affected by power surges in this way.
Power surges can cause incandescent bulbs to burn out immediately due to the sudden spike in voltage. Fluorescent lighting fixtures with electronic ballasts are particularly susceptible to damage during power surges, as this can cause the ballasts to fail.
Protecting your appliances: When power returns, there will be a surge of electrical energy that could damage sensitive equipment like computers, TVs, or VCRs. Unplugging them one by one, while leaving one light on, will let you know electricity has been restored.
Even if your electronic devices are turned off during a blackout, they can still get damaged when the power comes back on.
Circuit Breaker: After a power outage, your first step is to check the circuit breakers. These are the complicated collection of switches in a metal box, usually found in the basement or garage. They control the flow of electricity to areas of your home and might be the culprit for malfunctioning lights and devices.
Lack of power could be the result of a loose connection, faulty wiring, tripped GFCI outlet, or blown fuse. These issues are more likely if you have an older electrical system with a fuse box instead of an updated circuit breaker box. The problem may be due to frayed wires or an old outlet that needs replacing.
In simplest terms, a power outage is a loss of power while a power surge increases the voltage. A power surge may cause electronics or appliances to temporarily turn on and off. A power outage may cause appliances and electronics to turn off as well but probably for an extended period.
Keep the door closed as much as possible. Discard refrigerated perishable food such as meat, poultry, fish, eggs, and leftovers after 4 hours without power.
Voltage drops in your electrical system can be more than just a minor annoyance; they can actually cause serious damage to your electronics and appliances over time.
During an Outage
If the power goes out, unplug all electric appliances to avoid overloading circuits and fire hazards caused by the restored power. Turn your appliances back on one at a time when power is restored.
If the event that triggered the surge is covered under your policy, such as a lightning strike or downed power lines from a windstorm, then the answer to “does homeowners insurance cover power surges?” is typically yes, with the resulting damage covered under personal property protection.
An expert familiar with the claimed equipment can perform tests and confirm whether it has sustained damage from a high voltage surge. Though this cause of loss is common, it's important to note that items with surge damage can sometimes be repaired.
The short answer: we recommend buying a surge protector when you're replacing HID lamps (high intensity discharge) with LED lamps (light emitting diode).
Unplug everything in your home.
Turn off breakers or remove fuses. If there is an extended power outage, you may want to leave one lighting circuit on so you will know when the electricity comes back on.
For example, if an appliance overheats and dies due to a power surge, your homeowners insurance may help cover that loss. Homeowners insurance may also provide protection if a power surge damages the electronic parts of your TV, entertainment system or laptop.
Safety of Specific Food Products
Hard cheese, butter and margarine: Well packaged products should remain safe; if odors or mold develops, discard the items. Milk products and mayonnaise: Discard if held above 40ºF for more than 2 hours. This category includes milk, cream, yogurt, and soft cheeses.
“The refrigerator will keep food safe for up to 4 hours. If the power is off longer, you can transfer food to a cooler and fill with ice or frozen gel packs. Make sure there is enough ice to keep food in the cooler at 40°F or below. Add more ice to the cooler as it begins to melt.” [10]
A power outage may: Disrupt communications, water and transportation. Close retail businesses, grocery stores, gas stations, ATMs, banks and other services. Cause food spoilage and water contamination.
Flickering, Buzzing, or Dimming Lights
If your lights flicker or dim without a clear cause, it might be a sign of a power surge. Buzzing sounds are another red flag.
In extreme cases, faulty power supplies coupled with high voltage can become a disaster waiting to happen. Sparks and excessive heat from such scenarios can easily ignite fires.
Far from harmless though, power surges can damage your electrical outlets, fry your appliances and electronics and start dangerous electrical fires. Being cognizant and proactive against the causes of power surges can potentially save your electronics and more importantly, your life.
The short answer is yes—a power surge can indeed blow out your light bulbs. A sudden increase in voltage will overload the circuit and burn out the bulb at its weakest point, typically at the filament inside the bulb or within its wiring system. However, not all bulbs are affected by power surges in this way.
If you are the only one without power, and your meter shows a digital reading you should try resetting your main breaker. In most cases, this will be located outside your home near your electric meter, but in older homes, you may find it inside. The main breaker will be the largest breaker in the panel.
Flickering lights in particular are indicative of a dangerous electrical issue, such as a loose circuit connection, overheated wiring, splices coming apart, a fried fixture, a failing breaker switch, and an overloaded circuit.