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Fluorescent light only one bulb out of two burning very dim

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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!

Posted on Apr 20, 2013

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I have a coleman 5317 RC series lantern that wont go into the dim mode what can I do


Hello. I've just looked at several Coleman lamps, some have krypton bulbs (mainly battery powered), some spiral fluorescent bulbs (mainly mains powered/charged). If this one is yours http://www.coleman.com/Parts/100/parts-lanterns/5317-702/remote-control-pack-away-family-size-lantern# then it appears yours has a spiral fluorescent bulb. Gas discharge bulbs commonly are fired up by an initial high voltage pulse then followed by a continuous ac medium voltage (say 80 volts or so) to give a FIXED LIGHT OUTPUT.
THIS DOES NOT ALLOW CONTROLLED DIMMING. Dimming can usually only be done on an INCANDESCENT TYPE bulb eg an older type tungsten filament bulb. These are however much less efficient.
So in summary, if you do have a fluorescent bulb, I don't know why your remote indicates you can dim it. You could try switching the bulb for an incandescent type, but this should only be attempted by qualified persons. Check over the user manual again. Good Luck.

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I recently installed a lutron skylark dimmer w compatible gu24 bulbs on a 3 way connection. Everything works properly but the bulbs only dim slightly, is this normal or is something defective or improperly...


Are you using compact fluorescent? Are you sure you purchased a dimmer that is for incondescent lighting only? fluorescent lighting only? Fan motor control only? Are your lights led? I read on the instructions for one company that you can only use one dimmer on any one 3 way system. Did you put 2 dimmers on a 3 way system?

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I need more information. Are the fixtures pot lights? What kind of bulbs are you using? Floodlights, spotlights, incondescent (normal tungsten filaments) or fluorescent, compact fluorescent, led etc. Since most dimmers say in their instructions that they are designed for incondescent lighting only the bulb you use can either blow up the switch or cause troubles like you are specifying. Also inside pot lights are thermal cutoffs that trip and reset when the light is cool again. Can you remove the switchplates and see where it says incondescent only embossed into the aluminum heatsink? If it says something else, what does it say?

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1 Answer

WHEN ON DIM THE LIGHT FLICKERS


That is because the dimmer is designed for incondescent lights and you are using compact fluorescent. To solve the flickering problem add at least one regular bulb to the system. If there is only one bulb then replace with a regular bulb if you are using a dimmer.

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My screen is displaying all the boot sequence but its not illuminating .the display is too dim.but when i plug an external display unit it works .


Sounds like the back-light on your LCD is out. The bulb looks similar to a miniature fluorescent lightbulb and may be burned out. These are high voltage bulbs and use an inverter. The inverter may also be bad. It is best to take it to a reputable repair shop if you are not comfortable making the repairs.

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1 Answer

Hunt dimming fd


Ok - a couple of things, first - when a dimmer is set to minimum; zero to a barely perceptible level of light output is expected. Second, fluorescent lamps have a much shorter range of dimming that the standard incandescent lamps have. It is not unusual for a fluorescent lamp to remain off until the dimmer is at or above the half way point in the dimmer's range. Third, you can not dim a fluorescent lamp or fixture unless the lamp or fixture is specifically labeled as being "dimmable". Use of a dimmer to control brightness of fluorescent lamps and fixtures that do not clearly indicate they are designed for dimming or to control the speed of motors like those in "paddle fan & light fixtures" creates a dangerous fire hazard condition. Most CFL (compact fluorescent lamps) that readily replace the screw-in incandescent type lamps and are clearly labeled as dimmable, can be used with a standard dimmer. The traditional (non-CFL) fluorescent fixtures that have a internally mounted and hard wired internal ballast need a special dimmable ballast to operate.

Good luck!

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1 Answer

The dimmer switch will turn on and off but wont dim the lights on a chandelier. model 6681-w. tried 2 different ones with the same results.


The Leviton 6681 is a push-button rotary-type incandescent dimmer with 600Watt capacity
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If you have incandescent bulbs, the dimmer should work.
If the dimmer has different color wires, try reversing the wires.
If the dimmer replaced a 3-way switch, then this is not the right dimmer.
If you have compact florescent bulbs, you need a dimmer that also dims florescent.

http://www.google.com/products/catalog
Link shows the Leviton 6673 incandescent and florescent dimmer

But you also need dimmable compact florescent bulbs.
http://www.amazon.com/DIMMABLE-COMPACT-FLUORESCENT-LIGHT-SPIRAL/dp/B0014B84ZM

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We installed the new fourescent bulbs in our can lighting...some work great..other flicker for no apparent reason...does it have to do with the settings?


You can not dim compact fluorescent lamps. The ballast for the fluorescent is built into the bottom of the lamp. IF the manufacture says that it is dimmable, then you would need a special interface (Lutorn FDBI) to make it work properly. It may work for a short while with out it, but will burn out the ballast or dimmer.

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1 Answer

96 inch fluorescent light only one bulb will burn have changed bulbs and balist


If it is wired correctly,the only thng left is the tomestones, the contacts that the bulb connects to. Try this ;switch the two wires from the one bulb at the ballast to the other bulb on the ballast. If the other bulb now lights then the new ballast is bad and need to be exchanged.

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5 Answers

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