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Depends if ballast is in fixture and switch is on. Several watts if new ballast and perhaps 15 watts for old ballasts....

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Q: How much power does a fluorescent fixture use with no tubes installed For example a switched on 8' fixture with a single tube with an old ballast.?
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What happens to a non dimmable lamp if used on a dimmer?

If you use a non-dimmable Compact Fluorescent Lamp (CFL) in a circuit controlled by a dimmer switch no damage will be done but the CFL will stay bright when the dimmer is turned down whilst any other normal incandescent lamps wired into the same circuit will go dim in the normal way.Dimmable Compact Fluorescent Lamps are now available, for example in the Megaman range of CFLs. For more information see the Related Link shown below.Incandescent dimming uses any incandescent lamps and an incandescent dimmer.To dim fluorescent lamps usually requires use of fluorescent dimmers AND fluorescent dimmable ballasts. If these two components do not match, dimming will not work.The fluorescent lamps themselves are the same whether you put them in a standard (nondimming) ballast or a dimmable ballast.If your dimmers are not dimming the CFLs they are either not fluorescent dimmers or, more likely, your ballast in the light fixture is not a dimmable ballast.


What is an example of a false statement about skin pigmentation?

Human skin is fluorescent.


What is a Compact Fluorescent Lamp or CFL and how does it work?

A 3-way incandescent bulb works by having two separate filaments for the first two levels of brightness. For example, a 30-70-100 bulb will have a 30 watt filament and a 70 watt filament. The 3-way switch then turns on either the 30, the 70, or both - giving the 100 watts full brightness. (This is why a 3-way incandescent bulb usually burns out the most commonly used brightness level first.) A 3-way compact fluorescent, using the same simple 3-way switch, will either have two separate fluorescent tubes, one for each of the first two brightness levels (unlikely), or it will adjust the brightness electronically through an internal voltage (or other) adjustment based on which position the 3-way switch is set at. This is only an approximation - additional details would be interesting.


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Related questions

What the difference between ballast and transformer?

A transformer changes the amperage and / or voltage. It literally "Transforms" electrical energy. A ballast is like a capacitor. Think of a ballast as a short-term battery. It stores power then releases it as needed. A common example of a ballast is on fluorescent lights. Initially, a fluorescent light needs a big blast of energy to excite the gas molecules into emitting photons (light). Then it only needs a small amount of energy to keep the gas molecules in an excited state. However, that power has to be of consistent amperage and voltage. The ballast is designed to do that. The electrical ballast stores energy in the same way that a water ballast stores water for stability. Because the electrical ballast stores far more power than the device it regulates requires, it too provides a kind of electrical stability. That's why you often see a fluorescent light flicker or "lose stability" when the ballast starts to go bad. A transformer transforms voltage and amperage up or down. A ballast provides a stabile power supply.


What happens to a non dimmable lamp if used on a dimmer?

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What is an example of bouyancy?

The bouyancy of of a floating object is affected by ballast.


Is fluorescent bulbs as it lights up an example of plasma?

yes


What is the adverb of switched?

An adverb is a word that modifies a verb. In the case of the verb switched, an adverb example would be quickly, because it tells how something was switched.


How energy efficient is a fluorescent bulb and how much does it cost to run one 5ft fluorescent bulb 9hrs a day for the average business year excluding weekends bank holidays etc in british pounds?

The formula is (bulb watts x ballast power factor) x hours / 1000 = kWhCost is simply kWh x gbpFor example: Your light bulb is 60 watts, evidenced by the writing on the bulb saying... 60 watts. However, fluorescent lights have a ballast, which is a type of transformer. Each ballast converts the input voltage to something usable by the fluor. bulb. In the case of modern electronic ballasts (vs. magnetic), the power factor ranges from .65 - 1.0. You can get this info from the manufacturers website. For this demonstration, we'll use .88, which is the standard power factor in the US for the big 3 ballast manufacturers.Next calculate your hours, for the energy industry, we accept 2080 hours for office buildings. This covers janitorial staff, weekend workers, etc.So, we have (60*.88)*2080/1000 = 5798 kWh ?? The answer I get is 109.824 kWh when using the above formula. Where did 5798 come from ??


What is an example of a false statement about skin pigmentation?

Human skin is fluorescent.


Can color blind people see fluorescent colors?

I have partial colour blindness, and I see fluorescent colours as pale dessatureted colours. for example, where a normal person ould see a bright vivid fluorescent pink I see nothing but a pale salmon tone.


Which of fluorescent and florescent is spelt right?

The correct spelling of that word is fluorescent.Some example sentences with the word are:The fluorescent lighting in the office was broken.He wore a fluorescent vest when he cycled.Doctors have warned that working under fluorescentlighting for too long can cause eyesight issues and migraines.


Which program is an example of a locally installed email client?

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What is a Compact Fluorescent Lamp or CFL and how does it work?

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What is plasma matter example?

A plasma screen TV, the northern lights, and fluorescent light bulbs.