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A flickering light bulb can be caused by something as simple as a loose or incompatible bulb or a utility issue, but it can also be dangerous and potentially lead to fire or injury if caused by a loose service conductor or damaged circuit. |
Is a flickering light bulb dangerous?
Light bulbs flickering can be due to any number of issues — from innocuous and simple issues like a loose bulb to more serious problems that could potentially cause an electrical fire. Electrical malfunction is the fourth most common cause of house fires, causing approximately 7.7% of residential fires, according to house fire statistics.
Before worrying, investigate a flickering light’s meaning further to make sure there isn’t a larger issue with the electrical system on the property, which could have more serious consequences. First, observe the flickering pattern — how frequently, how long, and when it happens — to figure out a possible cause and whether a professional electrician is needed to diagnose and repair the problem.
What Causes Lights To Flicker?
Thankfully, most flickering lights are harmless, so the majority of residential electrical fires are preventable, too. By knowing the difference between harmless flickering and potentially dangerous electrical problems, issues can be spotted before they become a bigger problem.
1. Overloaded circuit
An overloaded circuit can cause lights to flicker in a house when too many appliances or devices are plugged into a single circuit. This overload causes the circuit to struggle and experience voltage fluctuations. These fluctuations can cause the lights to dim or flicker, and in severe cases, the circuit breaker will trip to protect from overheating.
Large appliances increase the load on the central circuit breaker, which can lead to lights flickering in one room or throughout a property. Consider having an electrician inspect the system to see if an electrical service or panel upgrade is needed. An electrician might also recommend the installation of a dedicated circuit to handle the electrical demand of large appliances.
2. Damaged circuit
More than one light flickering in a single room or area of a property may be caused by a defective circuit. This can mean:
- Loose connections
- Damaged wires
- Faulty switches
When a connection is loose or a wire is damaged, the electrical current may not flow consistently to the lights, causing them to flicker or dim. A faulty switch may also not be able to properly control the flow of electricity to the lights, leading to intermittent power supply and flickering.
Over time, the wires and connections within a circuit can become worn or damaged due to:
- Normal wear and tear
- Temperature fluctuations
- Exposure to moisture
Additionally, if a switch or other component within the circuit is defective, it may not function as intended, disrupting the electrical flow and causing the lights to flicker.
3. Loose bulb
Just one light flickering, especially if that light has an incandescent bulb, is likely just a bad bulb or a bulb that’s loose in its socket. Since this is an isolated problem, it can be solved by switching out the old bulb for a new one or just tightening the bulb in its socket. To prevent a burn or shock, remember to turn off the light before removing or adjusting the bulb.
4. Incompatible bulb
An LED light flickering that’s attached to a dimmer switch may be due to the bulb being incompatible with the dimmers. LEDs on dimmer switches tend to flicker when they’re set to low light. If the flickering continues, try changing the brand or type of LED light to see if that fixes the problem.
5. Loose service conductor
Lights flickering in multiple rooms may be a sign of loose service conductors in the central electrical panel. Loose service conductors can cause lights to flicker due to inconsistent electrical flow to the property. The service conductors are the main power supply cables that connect a property to the utility grid. If these conductors become loose or corroded, the electrical connection may not be stable, leading to fluctuations in voltage and power supply.
When the voltage drops, the lights may dim or flicker, and in severe cases, the circuit breaker may trip to protect the property from damage. Loose service conductors can also create a safety hazard, as they may spark or short circuit if they come into contact with each other or a grounded object. These loose connections are a fire hazard and will require an electrician to repair them as soon as possible.
6. Utility issues
Utility issues can cause lights to flicker due to disruptions in the property’s electrical power supply. These disruptions can be caused by a variety of factors, including:
- Equipment failures
- Storms
- Increased demand for electricity
When the power supply is unstable or interrupted, the voltage may fluctuate, causing the lights to flicker or dim.
When To Call a Professional
If the power supply (utilities and breaker) are fine and the bulb seems to be working properly, an electrician should be contacted. They will determine the flickering lights’ meaning and provide a solution.
Trust Rainbow Restoration for Smoke and Fire Damage
There are approximately 26,100 residential electrical fires per year. In the event of a disaster, the IICRC-certified service professionals at Rainbow Restoration are experts in fire and smoke restoration. Rainbow Restoration uses the most advanced tools and equipment in the industry to get homes and businesses back to their best possible condition with minimal loss of property from smoke damage.
Call Rainbow Restoration today to begin fire damage restoration.
This article is intended for general informational purposes only and may not be applicable to every situation. You are responsible for determining the proper course of action for your home and property. Rainbow Restoration is not responsible for any damages that occur as a result of this blog content or your actions. For the most accurate guidance, contact the Rainbow Restoration location nearest you for a comprehensive, on-site assessment.
FAQ About a Flickering Light’s Meaning
As an industry leader we believe setting the highest standards in water, fire, and mold damage restoration requires a continuous focus and dedication to education and improvement. This commitment to exceptional service also includes using our experience and expertise to answer your restoration questions.
Here are answers to some of the most frequently asked questions about flickering light bulbs.
Do flickering lights indicate an electrical problem?
Not always. Flickering lights can indicate an electrical problem, such as a loose connection, faulty switch, or overloaded circuit, but it can also be something as simple as a loose or wrong type of bulb.
Why are my lights flickering?
Flickering lights can be caused by an overloaded or damaged circuit, a loose or incompatible bulb, a loose service conductor, or utility issues. If property owners are unable to determine the cause, call an electrician for help.
When should I be worried about flickering lights?
Flickering lights are a concern if they’re frequent, happen to multiple lights in multiple rooms, last for a long time, or are accompanied by other electrical problems like buzzing sounds or tripped circuit breakers.
Are flickering LED lights dangerous?
Flickering LED lights can be dangerous if they are caused by a faulty electrical component or a loose connection. These issues can create a fire hazard or electrocution risk.
