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£20 35w
£24 55w
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∙ 14y ago
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How does a light bulb works in detail Does anyone know please help me?
What kind of light bulb? There are many kinds.Standard incandescent: A wire is heated by electric current until it glows white hot. The wire is typically Tungsten in modern bulbs because of it high melting temperature. Low wattage bulbs are at vacuum, but high wattage bulbs are filled with an inert gas like Argon to conduct excess heat away to the envelope faster.Halogen incandescent: One problem with standard incandescent bulbs is slow evaporation of the hot wire in the bulb and the condensation of the metal vapor onto the envelope. This makes the bulb slowly darken and eventually the wire breaks causing the bulb to burn out. By using a quartz envelope instead of glass, filling the bulb with a halogen gas, and operating at very high power (>150W) this process can be slowed: the halogen gas scavenges metal deposited on the envelope and deposits it back on the very hot wire. These bulbs are both very bright and last ~10 times as long as standard incandescent bulbs @ only 2 to 3 times the price.Standard fluorescent: These are basically mercury vapor arc-lamps - UV black-lights with a coating of phosphor (not phosphorus!) to convert the UV to usable visible light. They need a large ballast transformer and a starter switch to initially strike the mercury vapor arc when turned on. This makes them large, bulky, and expensive. But the bulbs usually last many years.Compact fluorescent: These are also basically mercury vapor arc-lamps with a coating of phosphor, like standard fluorescents. However to reduce size and cost a miniaturized electronic ballast/self-starter is built into the base.LED: These use Light Emitting Diodes. They last virtually forever, but individual bulbs still cost ~$40.Standard mercury vapor street light: These are high pressure mercury vapor arc lamps, but unlike the mercury vapor arc of fluorescent bulbs they give off bright white light directly, from the heat of the arc.High pressure sodium vapor street light: These are a more efficient version of the mercury vapor street light, but using sodium vapor instead of mercury vapor.Low pressure sodium vapor street light: These are a variant of the sodium vapor street light, but with low pressure sodium vapor. They give off a yellow light with a narrow one line spectrum, they are usually used at the request of nearby observatories to allow them to see the sky without interference of bright city lights.Neon sign lights: these use various inert noble gasses in a high voltage arc discharge to produce colored light. Typically used for signage.
How much cost a 1900 light bulb?
i dont know ether if you get the answer can u send it to me plz
How much did edison's light bulb cost?
The first commercially available light bulb cost $1 in 1881, which was three years after Thomas Edison developed the first practical incandescent light bulb. The Seattle Times reveals the $1 price in 1881 translates to $23 in 2013. By 1910, the cost of a light bulb dropped to 17 cents.
What is the descriptive use of an LED?
small, cost efficient light bulb.
Why does a 100W light bulb cost more than a 1200-W hair dryer does?
A 100 watt light bulb does not cost more that a 1200 watt hair dryer. The average price of a light bulb is about 90 cents whereas a hair dryer can range up to 20 dollars.
Which light bulb lasts longer cheap or expensive?
Mostly bulb which is a higher cost means a better quality.
What is the cost to replace a street light bulb?
The cost of the bulb is in the 30 dollar range. The cost to replace it depends on the hourly rate of the person changing the lamp and the additional cost of a bucket truck to reach the light fixture. This price will vary throughout the country in which you live.
If a fluorescent light blinks is the light bulb bad or the ballast?
I have seen it both ways. Usually it is the bulb which is a few bucks. The ballast will cost more and could cost $15-$30 bucks depending on type. If you have another bulb that is working, swap it with the flicker light and see if the problem goes away. If the swapped bulb works, I always put the bad bulb in the fixture where the good bulb came from. If the bad bulb now works, you could have a seating problem with the bulb. If it flickers, replace it.
How much does it cost to replace a ford escape brake light?
the price of the bulb
How much did a light bulb cost in Victorian times?
about 2-3 dolers
How much does it cost you to burn a 0 watt light bulb for 24 hours a cost of 0.085156 per kwh?
A 0 Watt bulb does not consume electric power so the cost is zero.
How much does it cost to get the headlights changed in a 2003 Nissan altima?
typically, you only change the bulb (it the bulb light is out). they usually cost a few dollars, if it is a busted headlight, do not know.
