Question about CCTUBEGN 12.5''TUBE Fluorescent Lamp Kit

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How to replace a tube holder or ballast

How do I replace a tube holder or ballast in a florescent light?

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You can replace a ballast or tube holder if you're fairly familiar with wiring. 1) Turn off the power to the circuit. 2) Remove the tube and the cover plate that conceals the workings. 3) Disconnect or cut the wires to the tube holder or ballast and remove. 4) Strip 1/2" of insulation from the ends of the wires. 5) Mount the component and connect the wires with wire nuts. 6) Replace the cover and tube. 7) Turn the circuit back on. 8) Turn the switch on.

Posted on Jan 18, 2006


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What is a ballast?

A ballast keeps a tiny charge running into devices that would otherwise need to "warm up" in order to function properly. Non-flicker florescent lights use a ballast so that they come on right away when you flick the switch.

Oct 29, 2014 | Televison & Video

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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

Someone told me to replace something called ''ballast'', what's that?

a ballast is like a transformer, as an example, florescent lights require one between the power supply and the tube.

Jan 20, 2011 | Sony XL-5100 Projector Lamp for Grand WEGA...

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Need to hook this up to a lutron eco-t528-277-2 ballast which only has a hot,dimmed hot and neutral

If I understand correctly, you have Leviton florescent dimmer

And you want to connect dimmer to Lutron ECO-series ballast

This is the ballast with 3 wires: Hot dimmed, Neutral and Hot

Is this your dimmer???? Has Black, White, Red, Yellow-red, & Orange


Here's how to do it:
Dimmer yellow-red is not used except for 3-way switch >> cap it off with wire nut
Dimmer orange wire connects to ballast Dimmed Hot
Dimmer red wire connects to ballast Hot
Dimmer white wire connects to ballast Neutral

Those are your wires going to ballast. As you can see, you need 3 wires going to florescent fixture

Next, let's focus on Dimmer:
Dimmer green wire goes to bare ground wire
Dimmer black wire connects to Hot from breaker box (we'll test for that next)
Finally the Dimmer white wire connects to ballast Neutral as discussed above BUT is also has to connect to Neutral from breaker box

This means the Dimmer white wire is connected to 2 wires >> one wire goes to florescent fixture and the other wire comes from breaker box

So which wires come from breaker box??
It should be a black and white wire.
Let's test to find Hot and Neutral that come from breaker box.

Mark your wires.
Disconnect all the wires and separate from each other
Turn on power
Use ordinary tester
Tape tester leads to wood sticks so hands stay away from electricity
Power is on
Test each wire to bare copper wire
When tester lights up, that is Hot from breaker box ... this wire connects to Dimmer black wire
Now, test the hot wire to each of the other wires
When tester lights up, that is Neutral wire ... this wire connects to Dimmer white wire, and also connects to Ballast neutral.

Connect one wire at a time, and it will work.

Oct 04, 2010 | Leviton Decora Light Dimmer Switch

1 Answer

The labtop screen is not lighting up I had it checked by A technician and he said the video is gone however it is made up to the mother board is this correct

no , that can't happen: your screen has tiny florescent tubes and, a ballast to light up the screen replace the ballast it is located in the bottom middle of the screen frame between the hinges; ebay sells the part.

Jun 24, 2010 | Computers & Internet

1 Answer


I strongly believe that one of two things has happened:
1) the back light 'florescent tubes' lamp ballast power supply board has gone out.
2) One of the florescent tubes has failed taking out the lamp ballast.
Is the TV still under it's factory warranty?
If it is not I would call around some TV service providers in your area and get some estimates of repair. Fairly common item to go out.
A/V Media Guy

Nov 22, 2009 | Televison & Video

1 Answer

The florescent light stopped working. Changed the tube and and starter and it still isn't working.

there is either a bad connection or no juice getting it the fixture or you have a bad ballast [transformer]..

Nov 12, 2009 | Viking VWH3010 Kitchen Hood

1 Answer

Vizio television screen flickers like a strobe light

lcd sets use florescent tubes to light the display and, a ballast to power the tubes just like the lights in an office ceiling.
the tubes are called cold cathodes and, the ballasts are called inverter boards. replace your inverter circuit board it connects by wires to the cold cathodes so; isn't hard to find.

Oct 05, 2009 | Vizio GV42L 42 in. LCD Television

1 Answer

Hussman DCCG Freezer

are they the florescent tube type?? i suspect that the ballast went bad

Apr 15, 2008 | Hussmann Commercial Freezer DCCG-12

1 Answer

When to replace

Inside a fluorescent light, electricity is delivered to a ballast, which sends a spark through the mercury-vapor-filled tube (or bulb), creating light by activating phosphors that coat the inside of the tube. If any of the components are faulty, the light won't work right. Once you pinpoint the problem, most fixes are very easy. Remember to turn off the power first! Old bulbs blink off and on just before they die; repairs are often simply a matter of replacing the tube or bulb. This problem may also be occurring because of poor contact between the pins at the ends of a tube and the tube holders. If the pins are bent, use needle-nose pliers to straighten them. Clean up the pins and socket contacts with fine sandpaper, and brush away residue. Though gray bands at the ends of tube are normal, black bands indicate that the tube needs to be replaced. If only one end is dark, turn the bulb end-for-end. If the tube is new and these fixes don't work, you may have to replace the starter or ballast. Some fixtures ("A-rated") are quieter than others are, but most fluorescent lights have a slight hum. If the sound seems too loud-- or if you can smell electrical burning-- shut off the power. The ballast is probably either the wrong type, improperly installed, or defective. Replace it or call an electrician. Brand new tubes tend to flicker, as do bulbs that are cold. If an old tube still flickers after it has had a chance to warm up (or after you've warmed up the room), rotate it a couple of times in the tube holders. Try cleaning the tube's end pins. If it still doesn't work, replace it. If only the ends of the tube glow, either the starter or the ballast is defective. Replace the starter, then the ballast.

Jan 18, 2006 | CCTUBEGN 12.5''TUBE...

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