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How to Achieve Better Garage Lighting

Light up your shop with inexpensive, 8-ft.long fluorescent light fixtures. With electronic ballasts and bulbs with a color rendering index of at least 85, you’ll have lights that show true color and turn on no matter how cold it is.

By the DIY experts of The Family Handyman Magazine

Better garage lighting

To efficiently light up a two-car garage, remove the bare-bulb porcelain fixtures (remember to turn off the power first) and replace each with an 8-ft. fluorescent fixture. (We recommend one 8-ft. fixture per vehicle space.) We like the type that use 4-ft. bulbs; the 8-ft. bulbs are difficult to handle. You can position the new lights to mount right over the existing ceiling boxes.

Keep in mind that not all fluorescent lights work in cold weather. Select your fluorescent fixture based on the lowest temperature in your garage. Refer to starting temperatures printed on the ballast. Regular magnetic ballasts in standard T12 fluorescent fixtures (which have 1-1/2 in. diameter lamps) are not recommended for temperatures below 50 degrees F.

If the temperature in your garage drops below 50 degrees, buy fixtures with electronic ballasts (not electromagnetic) because they start in temperatures down to 0 degrees F and lower. We recommend you buy fixtures that take size T8 lamps (1 in. wide), which are more energy efficient. They cost more initially but will save you money over time. Avoid energy-saver T12 lamps; they need a minimum of 60 degrees to operate properly.

When buying bulbs, especially for a woodworking shop where you need to see the true color of paints and stains, ask for lamps with a CRI (color rendering index) of 85 or above. This number usually isn't printed on the bulb or packaging, but it’s listed in the bulb company’s product catalog (and on some Web sites).

Once you know the exact ceiling fixture location, drill a 7/8-in. hole in the base of the fluorescent light's metal housing, directly over the existing ceiling box. Buy a 1/2-in. electrical bushing (at home centers and hardware stores) and snap it into the newly drilled hole so sharp metal edges won't cut into wires. Then attach the fixtures to the drywall ceiling by screwing them directly into ceiling joists.

Note: Make sure a ground wire is present and fasten it to the metal body of the fluorescent fixture.

Replace bare bulbs with fluorescent fixtures for brighter, more
consistent light.

Look for the cold starting temperature, which is only printed on
the ballast label.

A Well-Lit Garage

Overhead fluorescent fixtures provide ample light for doing woodworking projects, or working on your car, motorcycle or boat.

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Required Tools for this Project

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

    • Cordless drill
    • 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.

    • 8-ft. fluorescent fixture (electronic ballast)
    • 4 ft bulbs (CRI of 85 or better)
    • 1/2 in. electrical bushing
    • Wire nuts
    • 1-5/8 in. screws

Comments from DIY Community Members

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December 30, 10:12 AM [GMT -5]

I have put in multiple 4ft lights in my garage and am wondering if that is the problem with my cellphone or wireless landline. My garage is detached and the house has Aluminum siding over asbestos shingles; might also contribute. I would have never thought of this being a contributing factor. The only thing I could think of is to take care of this problem (although rather expensive) would be to replace them with LED lighting. Costly on the front end but on the back end they last a very long time.

May 07, 7:48 PM [GMT -5]

I currently have two 8 foot long flourescent fixtures in my 2 car garage workshop (Attached garage). They give great light, but from the beginning, they interfere with AM radio and phone reception. they are the type that can function in cold temperature. what can I replace them with? Help !

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How to Achieve Better Garage Lighting

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