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What is the difference between high and low pressure mercury lamps?
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What is the difference between UV lamps and IR lamps?
One emits light in the ultra-violet range, and the other emits light in the infrared range.
Element used in fluorescent lights?
The filament is usually made from wolfram (W) and the filling gas is argon.
Is mercury used in lights?
There are several types of lights using mercury:Mercury-vapor lamps use mercury to generate Ultraviolet light for tanning lamps. With a suitable phosphor the UV is converted to visible light. These lights are now baned and have been replaced with metal halide (e.g. sodium} lightsFluorescent lights, both the large tube types and new compact fluorescent bulbs, excite mercury vapour to generate UV and convert it to visible light with a phosphor coating. The new smaller bulbs use fraction of the mercury and no liquid mercuryBlue "neon" lights can use an argon mercury misture
Why do energy saving light bulbs use less electricity?
Energy-saving lamps, such as normal and compact fluorescents, use more of the energy they consume to produce light rather than heat. An incandescent light converts electricity to heat and light is simply a by-product of the heat.Fluorescent bulbs still have incandescent filaments, but they are used to emit the electrons that run the length of the tube colliding with the vapourised mercury and producing light.Mainly because they run "cool", a fluorescent lamp uses only about one fifth - 1/5 - of the electrical energy used by a lamp that has a hot, incandescent filament.Another good thing about fluorescent lamps is that they can have a useful life that is between 5 and 10 times longer than an incandescent lamp, saving even more money over a period of years. On the other hand, turning a fluorescent lamp on and off repeatedly, so that it only runs for for short periods, will radically shorten its lifespan. Also CFL bulbs tend to cause large amounts of radio frequency interference.If a fluorescent tube or 'bulb' is broken, the mercury is released which is poisonous.Another opinionSaying that the mercury in mercury lamps is dangerous is an urban myth which comes from the old styles of mercury discharge lamps and fluorescent tubes used over fifty years ago, which did indeed contain about a gram of liquid mercury!While in use such a lamp was not dangerous at all, but if the glass tube or bulb got broken the "blob" of mercury could certainly be dangerous to human health if anyone picked it up with their bare fingers or swallowed it to see what how it tasted.Mercury is the only example we have on Earth of a metal that is in its liquid state at room temperature. It was such a "curiousity" that several people did get ill - and may have died - from poisoning by mercury, but not much of it would have came from old fashioned "mercury lamps"!That said, anyone who advises you that "fluorescent lights contain mercury which is poisonous" about today's fluorescent lamps is making a very misleading statement which could be intended just to frighten people.No matter whether they are the "compact" or the "long tube" types, modern fluorescent lamps contain only an extremely tiny amount of a special mercury amalgam so that, whilst a modern lamp is in use, there is absolutely no danger to anyone.However, if such a lamp gets broken, then care must be taken to sweep up all the fragments carefully and dispose of them sensibly in something strong enough not to be cut by the broken glass, such as an old corrugated cardboard box or similar bound around with gaffer tape to stop it from being opened easily.Today, the main danger to people is the risk of getting cuts from the shards of glass, not from mercury poisoning!The answers to the Related Questions shown below give a lot more information about how compact fluorescent lamps work and about the very good savings you will achieve in the cost of electricity if you use them instead of normal incandescent lamps.
How do adjustable height lamps work?
The working principle behind the adjustable height lamps is very simple. The adjustable height lamps enables the users to adjust the height of the lamps to their preferred height.
What is the difference between high pressure low pressure sodium lamps?
the pressure ;)
Can a mercury lamp be run at low pressure?
Yes, Low Pressure and Medium (High) Pressure Mercury lamps are manufactured and used for UV treatment of water etc. Medium (High) pressure UV lamps have a relatively broadband output, with many emission wavelengths between 200 and 400nm, whilst Low Pressure UV lamps have a much reduced output to the extent that they are frequently referred to as monochromatic.
Do mercury lamps contain mercury?
yes, there is a coating in the lamp, which contain mercury
Do lava lamps have mercury?
yes
What are the different types of light?
Incandescent Lamps Light Emitting Diode Neon Lamps Fluorescent Tubes Compact Fluorescent Lamps Halogen Lamps Metal Halide Lamps High Intensity Discharge Lamps Low Pressure Sodium Lamps High Pressure Sodium Lamps
When will be the Mercury lamps will be stopped in market?
If you are referring to fluorescent and CFL lamps, it can never be totally eliminated. These are mercury vapor arc lamps using a phosphor to turn the UV to visible light. They have reduced the mercury dramatically, but it can't be totally eliminated. If all fluorescent and CFL lamps were banned and lighting was all converted to LED then use of mercury could be stopped. However most LED lamps cost at least ten times what CFL lamps cost.
What is the difference between UV lamps and IR lamps?
One emits light in the ultra-violet range, and the other emits light in the infrared range.
What alkali metal is used in street lights?
Sodium (chem symbol = Na) Mercury vapor is also used in street lights. Low pressure sodium vapor street lights are amber/yellow in color, high pressure sodium lights are white and mercury vapor lights glow blueish white.
Do compact fluorescent lamps contain mercury?
yes
What is CFL mhl and hpmv lamps?
The abbreviations are CFL - Compact Fluorescent Lamp, MHL - Metal Halide Lamp, HPMV - High Pressure Mercury Vapor, and one more is HPS - High Pressure Sodium lamp
What is the difference between daylight fluorescent and cool white fluorescent?
Daylight Fluorescent lamps have bluish-white illuminance, whereas coolwhite fluorescent lamps have yellowish-white illuminance.
Where is mercury located on earth?
in thermometers, barometers, fluorescent lamps and batteries.
