The common fluorescent lamp

It does not mean a fixture the thing with lamp holder sockets. Ballasts To turn on a fluorescent lamp, a high-voltage pulse of electricity must be sent through it. Once the lamp lights, the stuff inside the tube becomes a good conductor of electricity — too good — and then some way of preventing too much current from flowing through the bulb must be provided. Otherwise the lamp burns out in about a second.

The common fluorescent lamp

Print The fluorescent lamp is a major advancement and a commercial success in small-scale lighting since the original tungsten incandescent bulb. These bulbs are highly efficient compared to incandescent bulbs.

Light Guide: Fluorescent Lamp Identification

Fluorescence is the phenomenon in which absorption of light of a given wavelength by a fluorescent molecule is followed by the emission of light at longer wavelengths. Please watch the following 2: Fluorescent Bulbs Click here to for transcript of Fluorescent Bulbs video Types of Lighting, Fluorescent These fluorescent bulbs that you are seeing, the long tubes, basically have two electrodes on the sides.

And you pass electric current, and that creates an arc between the two electrodes, and that tube is filled with inert gasses. The inert gasses are argon or an argon plus krypton mixture.

No air in there. Just an argon plus krypton mixture, and you spark it with a little bit of mercury in there. When you generate that arc between two electrodes, on the two sides of that tube, that arc excites these mercury atoms to a higher state.

And then when they are coming back to the ground state, they have to release that excess energy that they absorbed, and they release it as non-visible UV light.

UV light is not visible. UV light is dangerous. Remember, UV light is what comes out when the mercury atoms are coming back to the ground state.

But you know this tube is coated on the inside. The inside wall is coated with a different material, a special material called phosphorous. And those particles that are coated have a unique ability to absorb this UV light that is released when the mercury atoms are coming to the ground state.

So that is absorbed, and that phosphorous coating will give out visible light. It absorbs UV light and gives out visible light. So without that phosphorous coating in there, a fluorescent bulb would not work.

The common fluorescent lamp

Fluorescence is absorbing UV light in the phosphorous and giving out visible light. So, change of frequency, or change of energy status, is called fluorescence and a bulb that uses this principle is called a fluorescent bulb.

Rapid start lamps

A fluorescent bulb consists of a glass tube with a phosphorus coating, a small amount of inert gas usually argon or kryptonmercury, and a set of electrodes. Contact points on the outside of the tube carry electricity into the bulb.

The animation below shows a step-by-step depiction of how fluorescent lamps provide light. Click on the "next" button to view each step.Fluorescent bent lamps. Fluorescent bent lamps come in a few different options. The most common that we see is a fluorescent bent T8 with six-inch leg spacing.

This lamp is almost always used in a 2 x 2 troffer. As a matter of fact, I saw these lamps used in both a hospital and an office space that I walked through while on the recent tour I mentioned. Lamp diameters range from 1" to ". The most common lamp type is the four-foot (F40), " diameter (also called T12) straight fluorescent lamp.

More efficient fluorescent lamps are now available in smaller diameters, including the " . The Most Common Problems with Fluorescent Lighting and How to Fix Them. Bad Lamps. Indicated by dark circles at the end of the lamps.

Simply replace the lamps, typically every two years depending on the amount of use. If you allow the lamps to burn out in the sockets this can burn out the ballast. The most common fluorescent lamp is the hot cathode: Parts: This lamp consists of a glass tube filled with an inert gas (usually argon) at low pressure.

The common fluorescent lamp relies on fluorescence - The Common Fluorescent Lamp Essay introduction.

The Common Fluorescent Lamp Essay Example | Graduateway

Inside the glass tube is a partial vacuum and a small amount of mercury. Inside the glass tube is a partial vacuum and a small amount of mercury.

Fluorescent bent lamps. Fluorescent bent lamps come in a few different options. The most common that we see is a fluorescent bent T8 with six-inch leg spacing.

This lamp is almost always used in a 2 x 2 troffer. As a matter of fact, I saw these lamps used in both a hospital and an office space that I walked through while on the recent tour I mentioned.

fluorescent light bulbs