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When the ballast is to be purchased, look at the schematic that is on the label of the ballast. There it will tell you which ballast is good for which lamps and also let you know what length of tube the ballast is good for. Most of the new electronic ballasts allow for multiple connections of different size lamps.

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Q: What size ballast do you use for a 4 foot tube?
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Is a T8 ballast and T8 bulb more efficient then a T12 ballast and a T8 bulb?

In a T* ballast and T8 bulb more energy efficient then a T12 ballast and a T8 bulb? A:Depends on the CURRENT through the tube. When the Tube is run at 100% of rating, The T12 Takes more CURRENT to give a certain Brightness. Because the surface of the T8 is closer to the ion stream through the tube, it takes less CURRENT to light up the T8 to the same brightness. However, IF you use a T12 in a T8 ballast, you will get LESS CURRENT through the tube, and LESS POWER consumed ALONG with LESS Light.


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.?

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


What type of a ballast do compact fluorescent lamps use?

a compact electronic ballast in the base of the lamp


Will a t 8 fluorescent tube work in a t 12 fluorescent fixture using a high output ballast?

Yes....usually. However, lamp (bulb) life may be somewhat shorter than if the proper t8 ballast is used. Since ballasts limit current flow in the circuit, a mismatched (t12) ballast would cause more current to flow through the t8 lamp than the lamp's design specification. The lamp's output would therefore be brighter in proportion to the additional current. Owners of aquariums and terrariums make use of this property by overdriving both T12 and T8 style lamps with ballasts designed to drive two (or more) lamps to drive a single lamp, therefore supplying 2x or more current to the lamp than its original ballast. This results in a greatly increased light output, somewhat reduced efficiency, and shorter lamp life.


How many watts does a HO 8 foot T-12 fluorescent lamp fixture draw?

Look on the ballast inside of the fixture. There is an amperage and a voltage on the ballast label. Use this equation to find the wattage. W = I x E, Watts = Amps x Volts. This will give you the answer that you are looking for.

Related questions

Does a tube light glow without starter?

yes..if we replace magnetic ballast with electronic ballast...there is no need of starter if we use electronic ballast.


Does ballast use amps?

Yes a ballast uses amperage. That is the number beside the letter A on the ballasts nameplate. Depending on the size of the lamp or lamps will govern the size of the amperage that the ballast will draw.


Does a ballast use electricity if no bulbs are present?

If you mean the ballast in a fluorescent light fitting where the ballast is wired in series with the tube, the answer is "No". Explanation: If no tube is in place, the light fitting's circuit is "open" so there is nothing to take any current from the "hot" supply wire and return it to the "neutral" wire.


Is a T8 ballast and T8 bulb more efficient then a T12 ballast and a T8 bulb?

In a T* ballast and T8 bulb more energy efficient then a T12 ballast and a T8 bulb? A:Depends on the CURRENT through the tube. When the Tube is run at 100% of rating, The T12 Takes more CURRENT to give a certain Brightness. Because the surface of the T8 is closer to the ion stream through the tube, it takes less CURRENT to light up the T8 to the same brightness. However, IF you use a T12 in a T8 ballast, you will get LESS CURRENT through the tube, and LESS POWER consumed ALONG with LESS Light.


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.?

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


Does a fluorescent light fitting with 4 x T8 2' 18W tubes and a 48W ballast use all 120W when running?

No, a fluorescent light fitting with a 4xT8 2' 18W tube and a 48W ballast does not use all the 120W when running.


Is tube light need dc voltage?

If you mean a Fluorescent tube light then no, you don't need DC. Household Fluorescent light tubes use AC mains electricity. The mains AC is passed through a ballast coil which reduces the current. A ballast coil works best when the AC mains voltage is at least 2 times the Fluorescent tubes working voltage. So, a simple inductor ballast can be used in Europe, where the line voltage is typically 220 to 240 Volts AC, to operate a 4 foot long tube, which operates at 85 to 100 volts, depending upon design. In the US and other places that use 120 Volts AC mains, the ballast is a combination auto transformer (to raise the voltage) and an inductor (the current limiter).


How do you use ballast in a sentence?

The boat had two different types of ballast.


How do you know what size football to use?

it is the size of your foot divided by 2


Can you use 5300k hid bulbs with 8000k ballast?

A ballast is a ballast in most cases. So yes you should be fine.


What type of a ballast do compact fluorescent lamps use?

a compact electronic ballast in the base of the lamp


Can you use 250W metal halide bulb in a 1000W metal halide ballast?

No. The lamp has to match the ballast. The lamp will not ignite if the wrong ballast is used.