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T8 and also T12 space two types of fluorescent lamps, which likewise are dubbed fluorescent tubes. T12 lamps were first used v magnetic ballasts. Newer modern technology allows them also to be provided with digital ballasts, i m sorry weigh much less than the old ballasts and also create less noticeable irradiate flicker. T8 lamps every use electronic ballasts made especially for this dimension lamp. The decision to purchase T8 lamps or T12 lamps depends on your intended usage or application.

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Replace current Lamp

Read the lettering ~ above the burned-out lamp. Girlfriend will view either T8 or T12 stamped top top one side near the finish with the prongs. You also will see the lamp’s rated wattage, commonly 32 watts for T8 and also 40 watt for T12.

Measure the diameter that the lamp. T12 lamps are larger than T8 lamps, through a 1 ½-inch diameter. The diameter of a T8 desk lamp is 1 inch.


Look at the troffer, i m sorry is the steel fixture the holds the ballast and lamps and also is shaped favor an upside-down trough. Recognize whether the is a lensed troffer, a louvered troffer or an open up troffer, in which the lamps are fully exposed.

Look because that an acrylic lens, a level sheet that spans the troffer below the lamps, diffuses light and reduces glare. This is a lensed troffer, i m sorry customarily offers T12 lamps.

For T8 lamps, look because that a parabolic louver troffer. It has several slanted openings that help shield the lamps from direct view, conference the light and redirect that out right into the room.

Conversions

Remove the old T12 magnetic ballast and also install a new, lighter-weight T12 electronic ballast to minimize light flicker and hum. Install the T12 tubes. Select from warmth white or cool white, depending on your light preference.

To boost efficiency, remove either kind of T12 ballast and wire a T8 digital ballast in the existing troffer. Purchase and also install T8 tubes.

To minimize glare and also distribute a much more uniform light, remove the open troffer or lensed troffer and also install in its location a parabolic louver troffer v T8 tubes.

New Installations

Choose T8 fluorescent lamps v parabolic troffers and also electronic ballasts for many applications, together they last longer than T12s and contain a triphosphor blend capable of producing a more natural light.

Choose T8 lamps where overheating is a concern, together they develop less warm than T12 lamps

Choose T12 lamps if initial cost is a concern, as they expense less than T8 lamps.

Choose T12 lamps v the older-style magnetic ballasts if you need to install lamps whereby there will be absolutely no interference to adjacent electronic equipment. In the alternative, purchase fixtures with T8 digital ballasts that have actually passive filtering.


Tip

A modern open troffer the is suspended native the ceiling and also has rectangular ends often hold T8 lamps. Older open troffers could have the old-style T12 ballasts and also lamps. Every lamps in an open troffer reflect their light openly in every direction other than straight up uneven wings are added to straight the irradiate downward. Open up troffers permit air to circulate roughly the tubes, i m sorry reduces heat accumulation in the fixture. A parabolic louver troffer, which provides T8 lamps, is right for applications that need uniform illumination. There space further design details within each category of troffer, and a range of choices to think about when selecting a T8 ballast. Talk with a lighting professional in the supply store. Tell him your requirements and preferences, and ask that to define the benefits and drawbacks of each form of troffer, ballast and tube. By examining your bright needs and also shopping carefully, friend will have the ability to choose the form of fixture, ballast and lamp the fits your needs.


Warning

Electronic ballasts can create interference or line noise. This might an outcome in troubles with sensitive electronic equipment as well as overheated transformers, motors and also neutral strength lines. The problem multiplies as soon as a big number the ballasts space installed and many lights are in usage at the exact same time.

T8 and also T12 lamps space not interchangeable, even though one size will fit into the various other size’s ballast.

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Shut off both the electric breaker and the light switch to your fixture before replacing lamps, re-wiring ballasts or installing new fixtures. Recognize your live, neutral and ground wires by tagging them once you remove an old ballast or fixture.


electronic ballasts can create interference or line noise. This might an outcome in difficulties with sensitive electronic equipment and also overheated transformers, motors and neutral power lines. The problem multiplies once a large number that ballasts are installed and many lights are in usage at the very same time. T8 and also T12 lamps space not interchangeable, even though one size will fit right into the other size’s ballast. Shut turn off both the electric breaker and also the irradiate switch to your fixture before replacing lamps, re-wiring ballasts or installing brand-new fixtures. Determine your live, neutral and also ground wires through tagging them when you eliminate an old ballast or fixture.

Writer Bio


Donna McLean began writing in 1967 with an short article published in the newsletter of she alma mater, Montana State University. Her articles have since showed up in a range of publications including the “Philipsburg Mail,” “Ghost city Quarterly” magazine and the association newsletter “Connections.”


Photo Credits


Ryan McVay/Photodisc/Getty ImagesRyan McVay/Photodisc/Getty pictures

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