• Share:
Save Money by Upgrading Fluorescent Fixtures

T-12 fluorescent bulbs, long used in garages and shops, are being replaced by energy-saving T-8 bulbs. However, you'll probably need to replace the old ballast; otherwise the new bulb will burn out too fast.

By the DIY experts of The Family Handyman Magazine

Replacing old ballasts

Fluorescent bulb manufacturers are phasing out the T-12 fluorescent bulbs used in shop lights. The energy-saving T-8 bulbs fit the sockets of the old fixture, but if you don't update the ballast, the new bulbs will burn out in no time. To get the expected life and light output from the new bulbs, you'll have to install a ballast that's right for your fixture and the bulb. Ballasts are rated by the type and number of bulbs the fixture holds. The light output is determined by the “ballast factor.” (This information is on the ballast label.) A high ballast factor means more lumens, but also more energy consumption and shorter bulb life. Ballasts also come in magnetic and electronic versions. We recommend an electronic ballast with a ballast factor of 79 percent or less and an “A” noise rating. That combination will give you adequate light output, low noise (hum), and long bulb life with a minimum of bulb “flicker.”

The downside to updating your ballast is that a ballast costs almost as much as a new fixture. If your fixtures are high-quality ones you want to keep or they're mounted to the ceiling and wired in conduit, you'll save time by installing a new ballast. But if yours are hung by chains and plugged into a receptacle, buying a new fixture may be your best option.

Find electronic ballasts in the lighting department at most home centers. Buy a new ballast based on the type and number of bulbs your fixture holds, as well as on the ballast factor and the sound rating.

Caution!

Environmental Warning: Old ballasts may contain polychlorinated biphenyls (PCBs), a toxic substance that must be disposed of properly. Bring old ballasts to your local recycling center for disposal.

Back to Top

Required Tools for this Project

Have the necessary tools for this DIY project lined up before you start—you’ll save time and frustration.

    • 4-in-1 screwdriver
    • Non-contact voltage tester
    • Wire stripper/cutter

Required Materials for this Project

Avoid last-minute shopping trips by having all your materials ready ahead of time. Here's a list.

    • Electronic ballast

Comments from DIY Community Members

No comments on the article have been posted yet. Be the first to add your comment!

You will be required to log in or create an account to post a comment.

closeX

Add Your Comment

Save Money by Upgrading Fluorescent Fixtures

Please add your comment
closeX

Log in to My Account

Log in to enjoy membership benefits from The Family Handyman.

  • Forgot your password?
Don’t have an account yet?

Sign up today for FREE and become part of The Family Handyman community of DIYers.

Member benefits:

  • Get a FREE Traditional Bookcase Project Plan
  • Sign up for FREE DIY newsletters
  • Save projects to your project binder
  • Ask and answer questions in our DIY Forums
  • Share comments on DIY Projects and more!
Join Us Today
closeX

Report Abuse

Subject
Reasons for reporting post

Free OnSite Newsletter

Get timely DIY projects for your home and yard, plus a dream project for your wish list!

Follow Us