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Why Are My Lights Flickering? Causes & When to Call a Pro

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H1: Why are my lights flickering? Here’s watt’s going on

By Vinnie Camenzuli, Founder & CEO · Taddeo Electrical Contractors, Inc., Lic. EC13007179 · 10 November 2026

Most flickering lights come down to one of three things: a bulb or fixture issue, a circuit that’s working too hard, or a loose connection somewhere in your wiring. The first one is usually an easy fix. The other two are your home asking for a licensed electrician. Here’s how to tell the difference, Florida edition.

Is a little flicker ever normal?

Sometimes, yes. A quick, faint dip when a big appliance starts up (like your AC compressor kicking on) can happen because large motors draw a burst of power for a split second. A single bulb that flickers can just be loose, failing, or not a good match for its dimmer.

What’s not normal is flickering that keeps happening, spreads to multiple rooms, or comes with buzzing, heat, or a burning smell. The Electrical Safety Foundation International (ESFI) lists flickering, blinking, or dimming lights as a warning sign of an overloaded circuit.

The most common causes of flickering lights

Here’s a quick way to match what you’re seeing to what’s likely behind it.

What you notice

Likely cause

What to do

One bulb or lamp flickers

Loose bulb, failing bulb, or a bad lamp cord

Turn it off, let the bulb cool, then check that it’s snug or swap in a new one

LED lights flicker on a dimmer

Dimmer switch not made for LEDs, or a bulb that isn’t dimmable

Use bulbs labeled “dimmable.” If it continues, have an electrician replace the switch with an LED-rated dimmer

Lights in one room flicker

Worn switch, loose fixture connection, or a circuit issue

Call a licensed electrician to check the switch, fixture, and circuit

Lights dim when the AC, microwave, or vacuum turns on

A circuit carrying more than it should, or shared circuits

Have an electrician check the load and whether a dedicated circuit is needed

Lights all over the house flicker, or some get brighter while others dim

Loose connection at the panel or the service coming into your home

Call an electrician right away. This one shouldn’t wait

Your neighbors’ lights flicker too

A problem on the utility side

Call your electric utility to report it

One rule to keep in mind: changing a bulb is fair game. Anything behind a switch plate, fixture cover, or panel door is a job for a licensed electrician.

Electrician reviewing notes beside a closed electrical panel in a Florida home garage

Florida homes have a few extra suspects

We see flickering for some very local reasons here in West Central Florida:

  • Air conditioning load. AC runs hard most of the year here, and a home whose circuits weren’t sized for today’s AC, appliances, and electronics can show it with dimming lights.

  • Older wiring. Many neighborhoods in Pasco, Hernando, and Citrus counties were built decades ago. Older homes can have worn connections, and some from the mid-1960s and early 1970s have aluminum wiring, where loose connections are a known concern.

  • Coastal air. In waterfront areas like Hudson, Tarpon Springs, and Crystal River, salty, humid air can corrode outdoor connections over time.

  • Storm season. Summer storms can disturb utility lines. If the whole street flickers, call your utility. If it’s just your house, call us.

When flickering means call right away

Call a licensed electrician promptly if flickering comes with any of these:

  • Buzzing, crackling, or sizzling from a switch, outlet, or fixture

  • Switch plates or outlets that feel warm or look discolored

  • A burning smell

  • Flickering in several rooms at once, or lights that surge brighter

  • Breakers that keep tripping (see our electrical troubleshooting service)

If you ever see smoke or flames, get everyone outside and call 911.

Watt Wants You to Know: Swapping a bulb is fair game. If the flicker comes back, or you notice buzzing, heat, or a burning smell, that’s your cue to call a licensed electrician.

What to do next

  1. Notice the pattern. Which lights flicker, how often, and does it line up with an appliance turning on?

  2. Rule out the bulb. With the switch off and the bulb cool, make sure it’s snug, or try a new one.

  3. Ask a neighbor. If their lights are flickering too, call your utility.

  4. Call a pro if it keeps happening. A licensed electrician can find the cause safely, whether it’s a switch, a circuit, or your electrical panel.

At Taddeo, we’ll track down what’s behind the flicker, explain it in plain English, and give you upfront pricing before any work starts. Most of our projects come with a one-year warranty.

Lights acting up? Call us Taddeo, not tomorrow! Call (352) 556-5276 or schedule your free estimate. We serve homes across Citrus, Hernando, Pasco, North Hillsborough, and North Pinellas counties.

FAQ

Can flickering lights cause a fire? The flicker itself doesn’t, but what’s behind it can. Loose connections and overloaded circuits can create heat, which is why repeated flickering is worth having checked.

Why do my lights dim when my AC turns on? Your AC draws a burst of power when it starts. A brief, faint dip can happen. If the dimming is noticeable or happens often, the circuit may be carrying too much, and an electrician should take a look.

Are flickering LED lights dangerous? Usually not. LED flicker is often caused by a dimmer switch that isn’t LED-compatible or a bulb that isn’t dimmable. If new, dimmable bulbs don’t fix it, have the switch and circuit checked.

Should I call the utility or an electrician? If neighbors are seeing it too, start with your utility. If it’s only your home, call a licensed electrician.

Related reading from Taddeo: “Why Do My Breakers Keep Tripping?” and “Signs It’s Time to Rewire Your Older Florida Home.” (Add links once their live URLs are confirmed.)

About the Author

Vinnie Camenzuli, Founder & CEO, Taddeo Electrical Contractors, Inc.

Vinnie founded Taddeo Electrical Contractors in 2010 and named it in honor of his father, Giuda Taddeo Camenzuli. “Taddeo” means “beloved” in Maltese. His parents immigrated from Malta in the 1940s, and his father taught him the value of hard work, discipline, and doing things right the first time. Vinnie started his career in the commercial sector, learning from seasoned mentors, before building Taddeo on a foundation of integrity and excellence. Today, Taddeo serves homes and businesses across West Central Florida under license EC13007179. Off the job, Vinnie loves camping, reading, and time with his wife and grandchildren, and he holds a black belt in Goju-Ryu karate.