Question about Lithonia Lighting 4 Ft. T12 Fluorescent Cabinet Light 2UC 40 120 M6

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Fixture/bulb wont light, went thru all troubleshooting check steps and still nothing

Properly installed by electrician, checked power, ballast, and new bulbs. Cannot get light to work

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I have a T12 fluorescent light fixture and replaced the bulbs and ballast. I have double checked all the wiring connections. I get the bulbs to light when I move the bulbs, but only for a second.


Your description sounds like the connectors for the tubes. Also RECHECK wiring. Different on newer ballasts. See below...

Turn off fixture, unplug, or deactivate fuse...

Pull out bulbs and the tin fixture cover/reflector.
Extract the bulb connector. Go to hardware and buy 4 more, and just replace them. The connections fail where the wire connects and the rigours of bulb replacements damage this piece. TONS easier to get new pieces.

ALSO!!!! many new (fancy schmancy) ballasts WIRE UP completely differently from the old ballast. Follow the wiring diagram on the NEW ballast. This detail trips up many.

Doc

Sep 13, 2016 | Photography

1 Answer

I have 3 new t5 4 bulb ho high bay fixtures with an advance ICN-4S54-90C-2LS-G ballast. When I turn on the switch only the 2 outside bulbs light up on all 3 fixtures. How can I make the inside bulbs


If only two bulbs are lighting on ALL the fixtures, this usually indicates wiring.
Check wiring diagram as follows.
If unsure, contact local electrician to ensure proper wiring within your states electrical code.
http://www.stanion.com/pdf/advance4.pdf

Nov 24, 2014 | Home

1 Answer

We have Lithonia 2 bulb fixtures in a recessed ceiling. We currently have 2 (25) watt bulbs in them. What wattage can I upgrade to ??


The ballast inside the fixture is rated to operate 2 25w bulbs. You can't put higher wattage bulbs in this fixture, unless you change the ballast. Sorry.

Sep 22, 2014 | Lithonia Lighting Fluorescent Flush Mount...

1 Answer

Fixture not working after bulb change


"CFLs" Compact Fluorescent Bulbs (with built in ballast) must be labeled as dimmable to be used on a dimmer circuit.

Traditional fluorescent fixtures must have a dimmable ballast installed inside and can be used with standard fluorescent lamps.

Fluorescent lamps must be sized to match the ballast. CFL's are matched at the factory, but others are not. Older fluorescent lamp fixtures have a ballast inside. A type rating is to operate (2) 48 inch / 40 watt lamps. Newer fluorescent lamps are rated for 32 watts, and these will not work - or will have a greatly reduced life.

If you installed CFL's, the first thing I would do is install regular incandescent lamps and see if it works as expected. If not, something else is wrong - otherwise - make sure you've got the right lamps in the fixture.

Mar 17, 2014 | Electrical Supplies

1 Answer

My yard light, I think its a mercury vapor light? will go off randomly at night and come back on after about 30 seconds continuously. Any suggestions?


Check whether it is self ballast, if it is self-ballasted, so the ballast is integrated with bulb itself, so you can replace it with a new bulb, it can be self-ballasted mercury vapor bulb or regular energy saving bulb., if it is mercury bulb need work with ballast, from your description, the capacitor should be replaced, which is a little bit complicated, you should check it with electrician, or you can do it carefully after you read some documents.

Safety Tips: Turn power off at any time before you start to repair any electric appliance or lighting equipment.

The following is some reference for mercury bulbs and its associcated ballast.

http://www.bulbspro.com/lightbulbs/hid/mercury-vapor.html

Good Luck

Nov 03, 2013 | Home

1 Answer

Fluorescent light only one bulb out of two burning very dim


I like to start by swapping the position of the bulbs. If the one that didn't light, now does, it probably indicates a bad ballast (that long thin black "boxy thing" with wires coming out of it - it may be under a removable metal cover). Next replace the unlit bulb with a new one. If that doesn't light, try swapping the new light to the other position. If you still can't get two bulbs to light, replace both lamps with new ones. A good indication of a bad bulb is one or both blackened ends. The bulbs having two pins on each end have a small filament inside. This blackening is the metal of the filament "boiling off" and depositing on the glass. Eventually the filament gets thin and breaks so it doesn't provide the heat necessary to "prime"" the mercury inside the bulb that conducts electricity and excites the phosphor coating inside the bulb that emits light.If none of this works, most probably the ballast has "gone bad" and it, or the whole fixture, must be replaced, normally by an electrician. This can be done by the home "handyperson." You can cut the wires, remove the old ballast and replace it with a new one, splicing them to those of the same color from the new ballast using small "wire nuts." The one black and one white are the 120 volt power input wires. There are normally a pair of reds, a pair of blues, and a pair of yellows. Any wires of the same color are interchangeable. The blues and reds will go respectively to the bulb's sockets on one end of the fixture; the two yellows go to the opposite fixture end and are connected, in parallel electrically, to the other lamp sockets. If this makes sense, you may attempt to change your own ballast. If not, hire an electrician. Match the specifications for voltage, wattage, and number of bulbs, from your old ballast to the replacement - there are several different important electrical values to match even if the ballast looks physically the same size. Last, always turn off the electricity, and verify that it is safely off using a test light or meter before working on the fixture. Even though the black wire is normally energized and the white has zero volts measured with respect to ground, sometimes their function is reversed by an amateur where the wall switch may disconnect the black wire and make the fixture go off (as it should) yet the white wire remains dangerously energized, which is why you always test both of the wires with the test light or meter with respect to ground before touching any of them. Again, if this is not PERFECTLY clear, hire an electrician. Don't take chances, Electricity KILLS!

Apr 20, 2013 | Home

1 Answer

Replaced sylvania 26 w 4 pin in overhead light fixture and it is not working


replace the ballast almost always these lights do not usually burn out the ballasts go bad

Dec 13, 2012 | Lithonia Lighting Fluorescent Flush Mount...

1 Answer

Fluorescent lights will not come on. There is power to the ballest.


Power to the ballast is good. The power you checked is known as the primary power. The secondary power from the ballast (transformer), should be around 600 volts. This 600 volts is what vaporizes the gas in the fluorescent lamp. Go to home depot and buy a magnetic field tester (we call it a thumper) It has a shirt pocket clip on it. Do not insert the thumper in the fixture lamp sockets, just put it in front of one of the light fixture sockets. It should beep and the light on the magnetic field tester (thumper) should come on if you have a magnetic field in the light fixture socket. This means that the light fixture ballast secondary is working. No beep and no light from the magnetic field tester (thumper) means your ballast is bad. Ballast are dangerous to replace. Have an electrician replace it. Your life is not worth losing over saving a few dollars.

Jan 06, 2011 | Lithonia Lighting White Finish 48" Wide...

1 Answer

How do you take the light fixture apart to fix the balace?


You may find that a new fixture is the easier and cheaper way to go as some ballast can be expensive and hard to find the matching style. A similar style fixture at Home Depot or Lowes cost, in a 2 pack about $18.00. Add a CF bulb to it for another $4.00 and you have a decorative similar fixture. Some ballast cost anywhere from $9.00-$50.00. If you wish to replace the ballast: (turn off the power) remove the globe, remove the existing florescent bulb, take the fixture off the ceiling (usually two screws) remove the wire nuts, make a small diagram of the existing wires and the color codes, take the ballast to the Home Depot or Lowes first, match the ballast. Now reverse the process to replace the fixture. Hope this helps. Good Luck!
Douglas

Oct 31, 2010 | Universal Lighting and Decor White...

1 Answer

One of my two hps bulbs is brighter than the other one the bulbs and one of the ballast are new the other ballast is a year old


Hi .. it could be the ballast .. an easy thing to do to troubleshoot this would be to swap the lamps. If the problem follows the lamp. then that is the problem. If the pronblem stays with the fixture, then I would replace the ballast in that fixture.

May 03, 2010 | Sun System 600 Hps Cool Grow Light System...

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