Construction Of Cfl

July 09, 2024 Post a Comment

Construction of cfl

In a CFL, an electric current is driven through a tube containing argon and a small amount of mercury vapor. This generates invisible ultraviolet light that excites a fluorescent coating (called phosphor) on the inside of the tube, which then emits visible light.

How CFL bulbs are made?

A CFL bulb is made of glass, a ceramic and metal base, a luminous powder called phosphor, and a small amount of mercury.

What are the applications of CFL?

Compact fluorescents are being used in residential applications replacing incandescent and halogen lights. They provide relatively shadow-free lighting in residential applications and because of their small size can fit nicely into sconces, ceiling lights and table lamps.

What chemicals are in CFL?

CFLs contain argon, a nonreactive noble gas, and a drop of mercury (Hg). When you turn on the electricity, electrons excite the Hg atoms. As these atoms return to lower energy states, they release the absorbed energy as ultraviolet (UV) light.

What is the importance of CFL?

Because CFLs use less electricity than traditional light bulbs, they reduce demand for electricity; that reduction means less greenhouse gas emissions (including less mercury) from power plants. CFLs contain a very small amount of mercury — an average of 4 milligrams in each bulb.

Which transformer is used in CFL?

Ferrite transformers an important component of CFL Ballast, is manufactured by Shah Electronics. In addition to ferrite transformers, toroidal coils are also important Electrical components in CFL Ballast.

Which metal is used in CFL bulb?

Tungsten is used in the filament for the light bulb.

What is inside a CFL bulb?

The white powder coating inside the glass tubing of a CFL contains a fluorescent coating. When electricity enters a CFL, mercury and argon fumes inside the bulb produce invisible ultraviolet (UV) light. This UV light reacts with the fluorescent coating to produce the white, visible light you see when you turn on a CFL.

What material is used to make bulbs?

The filament used in the bulb is tungsten. It is a rare metal extracted from the ores of wolframite and scheelite. It is a lustrous and silvery white metal. Tungsten has the highest melting point.

Who invented CFL?

Two years later in 1976, Edward Hammer at General Electric figured out how to bend the fluorescent tube into a spiral shape, creating the first compact fluorescent light (CFL).

Why CFL is more energy efficient?

Additionally, CFL bulbs release almost 80% of their energy as heat, while LED bulbs emit very little to no energy as heat, which increases their efficiency even more.

What are the disadvantages of CFL?

Some of the disadvantages of compact fluorescent bulbs are that they are cold temperature sensitive, not recommended for enclosed fixtures, can have a higher initial cost than incandescent, have a longer warm up time, they may have limited color temperatures, do not dim nearly as smoothly, and dimming decreases the

What are the types of CFL?

There are two types of CFLs — integrated and non-integrated lamps, where CFL-i denotes an integrated ballast and CFL-ni denotes a non-integrated ballast. Integrated lamps combine the tube and ballast in a single unit. These lamps allow consumers to replace incandescent lamps easily with CFLs.

Why mercury is used in CFL?

Mercury, an essential part of CFLs, allows a bulb to be an efficient light source. On average, CFLs contain about four milligrams of mercury sealed within the glass tubing. By comparison, older thermometers contain about 500 milligrams of mercury – an amount equal to the mercury in more than 100 CFLs.

Are CFL eco friendly?

CFL bulbs are not only a more eco-friendly choice but a safer one too. These light bulbs produce less heat which makes them a safer choice in a variety of different light fixtures. They cost more than incandescent but last 10x longer.

Why is CFL only 3 downs?

With the dawn of the new century, John Burnside, who captained the university football team in Toronto, reduced the quantity of players per side from 15 to 12, and brought in the rule in which teams must gain 10 years in 3 downs. In Camp's original rule teams had 5 downs.

What is CFL stability condition?

The Courant–Friedrichs–Lewy or CFL condition is a condition for the stability of unstable numerical methods that model convection or wave phenomena. As such, it plays an important role in CFD (computational fluid dynamics).

Why is CFL better than LED?

CFLs use 25-35% of the energy used by incandescent bulbs, but if you really want to make the biggest environmental impact on the environment, choosing LEDs is the way to go. Residential LEDs, especially those rated by ENERGY STAR, use more than 75% less energy and last 25 times longer than incandescent lighting.

How many volts is a CFL?

If you're talking about the mains voltage, it's usually printed on the base of the bulb, which is 120 volts in North America and 220 volts in most other parts of the world (100 volts in Japan). Some CFL's may be designed for 12 or 24 volt DC or even 277 volts for commercial and industrial applications.

What is the output voltage of CFL?

Typical voltages for CFL are 60V, but can vary vastly. The oscillation is performed by folding back the current through the tube to the NPN transistors via the two secondary coils of T1.