Lights usually flicker because of a loose or failing bulb, a dimmer that does not suit the bulb, a big appliance starting up, or a loose connection. One light is usually a simple fix. A whole room or house deserves a prompt look. Lights going unusually bright while others dim is urgent.
Is it one bulb, one room or the whole house?
How far the flicker spreads tells you most of what you need to know. The wider it goes, the further back the problem sits.
| How far it spreads | Where to look | How urgent |
|---|---|---|
| One bulb | The bulb, the socket or the fixture | Try a new bulb first |
| Every bulb on one dimmer | A dimmer that does not suit the bulbs | Annoying, not urgent |
| A brief dip when the AC or dryer starts | Normal startup draw, if slight | Mention it if it worsens |
| A whole room | A loose connection on that circuit | Book soon |
| The whole house | The panel, the service or the utility's side | Get it checked promptly |
| Some lights bright while others dim | A possible loose neutral | Urgent. See below |
What can I check myself?
Bulbs and dimmers are fair game. Anything behind a cover plate is not. Turn the light off and let the bulb cool before you touch it.
- Tighten the bulb. A loose one flickers, and this is the cheapest fix there is.
- Swap the bulb. Use a known good one, ideally a different brand.
- Check the dimmer. Is it rated for LEDs? Older dimmers often are not.
- Notice the timing. Write down whether it happens when the AC, dryer or microwave starts.
- Stop at the wall. Do not open switches, boxes or the panel. Tell the electrician what you saw.
When are flickering lights dangerous?
When the flicker comes with heat, smell, sound or unusual brightness. Loose connections make heat, and heat is what you want to catch early.
- Burning smell, or warm switches and outlets. Turn off that circuit if it is safe to do so, then call or text (305) 859-1478 instead of filling in a form.
- Lights going very bright while others dim. This can mean a loose neutral. Turn off sensitive electronics, call your electric utility, then get an electrician.
- Smoke or fire. Leave and call 911.
Your utility depends on your address. Around Orlando it may be OUC, Duke Energy Florida, Kissimmee Utility Authority or Winter Park Electric Utility, and your bill will tell you which. The areas page lists them by city.
Why do my lights dim when the AC kicks on?
A big motor pulls a surge of current for a moment as it starts, and your lights can feel it. A slight, brief dip is common. A deep dip, or one that lasts, suggests a loose connection, a tired AC component or a service that is short on room. If it happens along with a main breaker trip, read how many amps your house needs.
Why do my new LED lights flicker?
Usually a mismatch, not a fault. LEDs draw so little power that older dimmers can struggle with them, and some cheap bulbs do not dim well at all. Try a bulb the dimmer maker lists as compatible, or have an LED-rated dimmer fitted. Planning new fixtures anyway? See lighting installation.
What does it cost to fix flickering lights in Orlando?
A typical repair visit in Orlando costs $150–$500, covering about one to two hours of diagnosis and minor repair. See your price, tell us what you noticed, and get a licensed electrician to find it. See flickering lights repair and the repair cost guide for more.
Common questions
Is it normal for lights to flicker when the AC turns on?
A brief, slight dip when a big motor starts is common. If the dip is getting deeper or longer, or it comes with other symptoms, get it checked.
Why do my LED lights flicker?
Often it is a dimmer that does not suit the bulb, or a bulb that is failing. Try a different LED bulb, then a dimmer rated for LEDs.
Can flickering lights cause a fire?
The flicker itself does not, but a loose connection behind it can make heat. A burning smell or a warm switch means turn that circuit off if it is safe, and get help.
