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Cool white flouresent bulbs (t12) will work in fixture with trigger ballast but daylight (t12) will not work????

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Check the numbers at the beginning of the bulb itself,, be sure its for a regulated ballast not a electronic one depending on which ballast you have

Posted on Aug 02, 2010

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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

My brand new shoplights flicker nonstop. Both of them. Bulbs are gef34 cw c41 eco hg. Lamp calls for f40 t12 in 25, 34, & 40 watt varieties. Am i using the wrong bulbs? or are my lights garbage?


Brandon, Do the lights have cold start ballast in them, if they do best to use cold start bulbs. press the helpful button

Do not put two different size or make of bulbs in the same fixture.

Feb 07, 2016 | Dryers

1 Answer

One flouresent tube in two tube fixture will not light


The tube that doesn't light is probably burnt out, buy a new one and install it, if it doesn't light, then you may have a ballast problem if they are flourescent bulbs.

Mar 20, 2014 | Home

1 Answer

Maintenance


Generally you can't run ECO or ALTO tubes (less mercury) in fixtures meant for regular Rapid Start/ Preheat tubes. Other than that Old tubes near end of life sometimes do that.

Feb 24, 2014 | Televison & Video

1 Answer

How do i remove a ballast


ballast--- -usually a ballast transformer used in flouresent lights to turn 120 volts ac into 2000 or 3000 volts ac at a lower amperage. the ballast transformer has 4 nuts ,one at each corner for physical mounting .2 wires for the ac line cord and 4 wires for the flouresent tube. wires are connected together with wire nuts that can be pulled off the wires while unscrewing the wire nuts.
make a picture of what color wires go where,take wires off one at a time and make pictures. the wires are not interchangable and must go back exactly where they came off from or the unit will never work again.
many ballast transformers have an electrical diagram showing where the wires go. you may need a magnifing glass to see it well enough read it. Please study the diagram and understand it before you begin disassembly.
WARNING: You must make sure that the electriic cord is unplugged or the circuit breaker on the OFF POSITION
with the electricity on ,you can be electrocuted by either the 120 volts ac or the 3000 volts ac that means crash,burn and fry.
so de-energize first.
The replacement ballest must be rated for the wattage of the flouresent bulbs ,the length of the flouresent bulbs and the diameter of the flouresent bulbs. that are in the lighting fixture. the flouresent bulbs also have their own make and model numbers.the model numbers of the bulbs are standardized throughout the industry. The model number of the flouresnt bulbs that a ballast will work with is on thw ballest sticker, on the cardboard box and on the directions.the salesman in the flouresent ballest [lamp] section at home depot or lowes should also be able to help you.

Sep 08, 2012 | Hampton Bay 24002 Ceiling Fan

1 Answer

We have 48" lithonia flouresent


even if there is power at the sockets, ballast may not have power to fire off the lamps, how old is this fixture, and you need to replace the ballast same as in fixture, if you replace ballast make diagram of wiring so you can rewire it like it was wired from store.

Aug 21, 2011 | Lithonia Lighting White Finish 2 12" High...

1 Answer

I have an ge proline magnetic t12 ballast it has two red leads two blue leads and two yellow where as my fixture has one red one blue and the hot and nuetral are wired through the other side of the bulb...


Need more information, how many lamps are in the fixture? The new ballast is for how many lamps? Basically you need to follow the diagram on the new ballast. If the new ballast is for a four lamp fixture one yellow gets capped and the other yellow goes to one side of each lamp on a two lamp fixture. Then on the other side one set either red or blue goes to the other side of the lamp one wire per lamp and the other set gets capped . Hopefully this helps parkeroc68_0.jpgparkeroc68.jpg

May 22, 2011 | Electrical Supplies

1 Answer

Replacing old flor 48" tubes


There are three types of fluorescent 48" bulbs t 12, t8, and t5. they are not interchangable. if you have a fixture that has a t12 type ballast, it will not light up the t8 bulbs. you have to change the ballast to a t8 style. just to clarify, the number stands for 10ths of an inch in diameter on the bulb. a t12 is 1.2 inches, a t8 is .8 inch and a t5 is .5 inch.

Nov 20, 2010 | Microwave Ovens

1 Answer

LIGHTING QUESTION: I have a GE Pro line T8 Ballast w/ (8) wires (2) Blue, (2) Red, (2) yellow plus Black & White. I know what the Black & White are for and are not connected to the lamps. Can you...


Try this link-- for a wiring diagram--- let us know if this helps-- Mack
http://www.replicasuper.com/wp-content/uploads/2016/01/T12-Ballast-Wiring-Diagram-Here-Is-An-Example-Of-A-Circuit-That-You-Can-Make-The-Guidelines-For-Making.jpg

Oct 27, 2017 | Vacuums

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...

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