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The ballast of a fluorescent lamp (whether modern electronic or conventional large inductance) will cause a kickback voltage when the lamp starts up that causes electrical breakdown and destruction of the standard dimmer's Triac (a solid state switch). There are some special electronic ballasts that don't do this and will work with ordinary dimmers (just don't expect a linear dimming effect like you got with an incandescent bulb). The special dimmers that work with ordinary ballasts use special high voltage switching circuits with extra protection components to prevent this damage. This makes them more expensive.

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Q: Why do you need a special light dimmer for fluorescent lights?
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Related questions

Can old or weak fluorescent lights explode if they're not changed?

Old fluorescent light do not explode. It will go only dimmer and dimmer or sometimes flickering and flashing on/off when it is defective.


Can you put fluorescent tubes on a dimmer switch?

Yes, as long as it is just incandescent bulb lighting connected to the track. If there is a transformer between the voltage source from the track and the light bulb (e.g. low voltage quartz bulbs) then these fixtures can not be dimmed.


Can a dimmer switch be added on any light?

only regular lights like in ur house if u want to dimm a fluorescent light u have to change out the ballast to a dimmable ballast


What are cfl lights?

A CFL light is a Compact Fluorescent Light.


Which circuit can decrease the fluorescent brightness to the minimum amount?

You need to purchase a Fluorescent dimmer switch, no circuit can dim the brightness of the light safely.


What is the most unflattering light to do makeup in?

Fluorescent lights!


What helps produce light in fluorescent lights?

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Do you need special light bulbs for dimmer switches?

If you are using what most of us think of as a normal light bulb, what is called an incandescent bulb, you do not need special bulbs. Any fluorescent light bulb, including the new curly bulbs called CFLs, requires a special ballast. The ballasts are built into the CFLs so you would need to buy bulbs specially labeled for dimmers. Never place a dimmer on a fan, or any motor, unless it is specifically labeled for use with a dimmer.


Is fluorescent lights fixtures ac or dc?

The basic fluorescent light fixture is AC, although there are fluorescent lights powered by DC.


Type of light that produces little heat?

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How often do fluorescent lights have to be changed?

Depending on the size of the light and how it is used, a fluorescent light can have a lifespan of anywhere from 8,000 to 30,000 hours. Fluorescent lights tend to lose their brightness over time, so it is recommended to change the light bulb before it burns out completely.


What is wrong when all your dash lights go dim?

Check the light dimmer switch to see if the lights go dimmer or they stay at the same brightness. It sounds like the dimmer switch is either stuck or bad.