ask the electrician
Electrician Training Electrical Certification wiring recessed light fixtures Electrical Wiring Electrical Troubleshooting and Electrical Repairs wire outdoor light fixture Home Electrical Wiring Diagrams
wiring home generator and transfer switch wiring a 220 volt range cord outlet Wiring for GFCI Outlets Wiring Outlets and a Switched Outlet Wiring and Installing Ceiling Fans and Remote Controls wire dimmer switch wiring diagrams for switches wiring a dryer cord and 220 outlet circuit breaker panel
Electrical Wire and Cable

Why Fluorescent Lamps May Not Be Bright

My kitchen fluorescent lights have dimmed down to the point where we can barely see that there’s electricity even getting to them…

Electrical Video #1

Electrical Wiring Tips

Helping You to Wire It Right!

See more Home Electrical Wiring Videos

Check out my YouTube Channel, and Subscribe!

See the Electrical Wiring Video #2 Below:

Fluorescent Light Fixture
[ad#block]Question: Why is our fluorescent light fixture dim?

Thanks in advance,

This electrical question came from: Dave, a Homeowner in Maine.

Dave’s Reply:
Thanks for your electrical question Dave.

Dim Fluorescent Light Bulbs and Bad Lighting Ballast

More about Lighting and Electrical Wiring

Lighting for the Home
recessed lighting

Planning and Installing Home Lighting

Home lighting articles covering recessed lighting, under cabinet lighting, lighting terminology and more.

For more information about Troubleshooting
Repair Electrical Wiring

Troubleshooting and Repairing Electrical Wiring

Licensed Electrician Reveals the Secrets of Successful Electrical Troubleshooting Methods used to solve the majority of the home electrical problems and wiring failures encountered.

The following may also be helpful for you:

Electrical Wiring Video #2

Home Electrical Wiring Videos about this Topic and More

Check out my YouTube Channel, and Subscribe!

Learn more with my Home Electrical Video Course:

Basic Home Electrical Wiring by Example

Dave's Guide to Home Electrical Wiring:

» You Can Avoid Costly Mistakes! «

Here's How to Do It:
Wire It Right with the help of my Illustrated Wiring Book

Great for any Home Wiring Project.
  electrical wiring  

Complete Guide to Home Electrical Wiring

Perfect for Homeowners, Students,
Handyman, Handy Women, and Electricians
Wiring GFCI Outlets
Wiring Home Electric Circuits
120 Volt and 240 Volt Outlet Circuits
Wiring Light Switches
Wiring 3-Wire and 4-Wire Electric Range
Wiring 3-Wire and 4-Wire Dryer Cord and Dryer Outlet
How to Troubleshoot and Repair Electrical Wiring
Wiring Methods for Upgrading Electrical Wiring
NEC Codes for Home Electrical Wiring
....and much more.

Be Careful and Be Safe - Never Work on Energized Circuits!
Consult your Local Building Department about Permits and Inspections for all Electric Wiring Projects.

More articles about Fluorescent, Magnetic Ballasts and Home Electrical Wiring:
« Previous Next »
Electrical Wiring for Ceiling Fan Switches Electrical Wiring for Trailer Home Bedroom Light

FAQs Frequently Asked Questions and Comments

4 Responses to “Why Fluorescent Lamps May Not Be Bright”
  1. Mike Heffernan says:

    My kitchen fluorescent light has 8 F40 T12’s in them. I replaced all the bulbs. When I turned them on 4 were working right and 4 are just dim and stay dim. No flickering. There are 2 sides with 4 bulbs on each side that have 4 different fixtures. Each fixture has 2 bulbs. Does each separate fixture have a ballast, or are there 2 ballast for all 4?

    Confused in Spring,Texas Mike.
    Thank you in advance.

  2. Dave Rongey says:

    Hi Mike,
    From what you have described, each 2 light fixture has 1 ballast. With fluorescent lights, if the lamps are allowed to burn out in the socket then there is a great chance that the ballast will need to be replaced along with the lamps. For more about repairing fluorescent light fixtures see this article:
    I hope this helps,

  3. Avery says:

    None of the 4 fluorescent bulbs were working in my light fixture so I replaced both ballasts, and put the same bulbs back in. When I turned on the fixture the lamps glowed dim. Did I ruin the ballast by putting the same bulbs back in for less than five minutes? I put four new bulbs in the fixture but they are still dim.

  4. Dave Rongey says:

    Hi Avery,
    Installing the original lamps with new ballasts for a short time should not have caused the ballasts to be ruined. Double check all of the wiring connections to make sure they are correct and the lamps are properly installed.
    I hope this helps to get your light fixture working,