Image Quality, Lighting & Framing
How to stop webcam video flickering under LED or fluorescent lights
Quick answer: Flicker is a frequency mismatch between your lights, which pulse at 50Hz or 60Hz, and your camera's exposure timing. Set the anti-flicker or power-line frequency setting to match your region — 60Hz in North America, 50Hz across most of Europe, Asia and Australia.
Flicker under LED or fluorescent lights is caused by the light itself pulsing faster than you can see, but at a rate that clashes with your camera's exposure timing — a solvable frequency mismatch rather than a defect.
Because it is a mismatch rather than a fault, the fix is almost always a single setting. The rest of this page covers what to do when that setting alone is not enough.
Try It Yourself
Confirm the flicker is frequency-related
Shows your live feed so you can watch banding change as you switch the anti-flicker setting between 50Hz and 60Hz.
Run the free online webcam testUnderstand the actual cause
Mains-powered LED and fluorescent lights pulse on and off at either 50Hz or 60Hz, matching your local power grid, invisibly to your eyes. If your camera's sensor reads frames at a rate that does not line up with that pulse, you see visible flicker or rolling bands.
Rolling horizontal bands that drift up or down the frame are the classic signature, and they distinguish this from a driver or bandwidth problem.
Set your camera's anti-flicker or power-line frequency setting
Most webcam software, and Windows itself, include an anti-flicker setting where you choose 50Hz or 60Hz to match your region. Setting this correctly resolves the vast majority of flicker cases immediately.
Identify the exact flicker frequency affecting your setup with the Flicker & Shutter Frequency Scanner.
- Use 60Hz in North America and parts of South America and Asia.
- Use 50Hz across most of Europe, Africa, Asia and Australia.
- If unsure, try both and keep whichever removes the banding.
Check the Windows camera settings specifically
In the Windows Camera app, or in Device Manager under your camera's Properties where available, there is sometimes a dedicated flicker reduction or power line frequency control, separate from any manufacturer app.
This matters when no vendor utility exists for your camera, which is common with laptop-integrated modules.
Switch to a different light source as a workaround
Not all LED bulbs flicker equally — cheaper ones with simpler driver circuits are noticeably worse. If anti-flicker settings do not fully resolve it, a bulb explicitly marketed as flicker-free can help.
A quick test: point a phone camera at the bulb in slow-motion mode. Visible banding there predicts banding on your webcam.
If banding persists after correcting frequency, the Dynamic Range & Exposure Meter shows how your camera is metering the scene.
Avoid dimmable LEDs at partial brightness
Dimming most LEDs works by switching them on and off even faster than their base flicker rate, which often makes camera-visible flicker significantly worse than running them at full brightness.
If you need less light, move the lamp further away or diffuse it rather than dimming it.
Rule out a genuinely faulty bulb or fixture
If one specific light flickers on camera and others in the same room do not, that bulb, its dimmer or its ballast may be failing, independently of any camera setting.
Swapping the suspect bulb with a known-good one from another fixture is the fastest way to confirm this.
To check how your bulbs affect colour as well as flicker, use the Color Temperature Estimator.
Where the anti-flicker setting lives on each platform
This control sits at the driver level, so it lives in system or vendor settings rather than in a conferencing app.
Windows
Device Manager → camera → Properties → Video Processing
Not every driver exposes this page; where it is missing, the vendor utility is the only route.
Logitech
Logi Tune, or Logitech Camera Settings → Anti-flicker
Logitech labels this NTSC for 60Hz and PAL for 50Hz on some older models.
OBS Studio
Source → Properties → Configure Video → Camera Control
Configure Video reaches the DirectShow property sheet, which often includes power line frequency even when no vendor utility exists.
macOS
No system-level control; use the vendor utility
macOS exposes no anti-flicker setting, so external cameras with their own utilities are easier to correct than built-in ones.
The table below shows where the anti-flicker setting actually lives on each platform and what control it offers:
| App | Practical ceiling | Manual control |
|---|---|---|
| Windows | 50Hz or 60Hz selection | Power line frequency |
| Logitech | 50Hz, 60Hz or auto | Full manual selection |
| OBS Studio | Whatever the driver exposes | Driver-level property sheet |
| macOS | Depends entirely on the camera | Vendor utility only |
Troubleshooting checklist: flicker under LED or fluorescent light
One setting resolves most cases. The rest of the list covers what to do when it does not.
- Identify your local mains frequency: 60Hz in North America, 50Hz across most of the rest of the world.
- Set the anti-flicker or power line frequency setting in your camera utility to match.
- If no utility exists, check Device Manager → camera → Properties → Video Processing.
- In OBS, use Source → Properties → Configure Video to reach the same driver control.
- Try the opposite frequency setting if the first choice does not remove the banding.
- Run any dimmable LEDs at full brightness rather than partially dimmed.
- Point a phone camera at each bulb in slow motion to identify the worst offender.
- Swap a suspect bulb with a known-good one to rule out a failing fixture or ballast.