Intro: Flickering lights are annoying, but the cause is often simple.
1. Check the bulb
Loose or faulty bulbs flicker.
2. Check the switch
Worn switches cause intermittent contact.
3. Check the fitting
Loose connections inside the fitting can flicker.
4. When to call an electrician
If multiple lights flicker at once.
Summary: Most flickering lights are caused by loose bulbs or worn switches.