Low pressure UV germicidal lamp is a kind of short wave low pressure mercury vapor discharge lamps. Germicidal lamps should not be confused with fluorescent lamps for while fluorescent lamps are also Low pressure mercury lamps. Germicidal lamps can not be confused with sun tanning lamps or black light lamps either, for while these are also ultraviolet tamps, the ultraviolet produced is of longer wavelength and is not useful for germicidal purpose.
Today, after many years of research, it has been discovered that the most effective alternative process available to us is the disinfection of water and air using ultraviolet light (UV). L (low) germicidal lamps use ozone free fused quartz which cuts off 185nm ozone-producing line and emits 254nm line only.
VH (very high) germicidal lamps use high purity fused quartz which emit both 185nm ozone-producing line and 254nm germicidal line.
High Output (HO) Germicidal Lamps emit 40%-60% more UV output than normal lamps of the same length.
Very high output (VHO) germicidal lamps emit 3 times the UV output of normal germicidal lamps. Slim-line germicidal lamps are instant start, hot cathode utilizing a coil filament on each end which operates hot.
Preheal germicidal lamps are operated by a preheat-start circuit that employs a relatively compact and economical ballast.
Thc design of "H" shaped and "U" shaped germicidal lamps is primarily employed in application where more intense UV radiation is needed in a limited space.
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Ultra Violet light is the invisible light that exists just beyond the shortest light rays (violet) in the visible light spectrum. The interesting paradox about the former term for ultraviolet light, "chemical rays" is that Ultraviolet C, light wave technology actually offers a chemical-free way in which to sanitize and safely de-germ a variety of industrial and household surfaces.

Natural ultraviolet light is emitted by the sun in three bandwidths, as UVA, UBC and UVC light, but 98.7% of that light is absorbed by the earth's atmosphere and the remainder of the UV light that reaches the earth's surface consists of predominantly UVA radiation. With the growing interest in eliminating toxins and allergens from the home environment, the germicidal power of UVC light offers a welcome alternative to chemical cleaning products. Mattresses, carpets and bedding are perfect breeding grounds for dust mites and other allergy-causing microorganisms that can trigger asthma, hayfever, eczema and other illnesses. A word of caution about UVC light: protective eyewear is advised when using these products, as UV light sources should NOT be looked at directly, just as one is advised not to look at the sun during an eclipse. The excited atom of mercury vapor emits short wave ultraviolet light under the low pressure in the sealed glass tube. The fluorescent lamps use less purity normal glass tube which transmit small amount of ultraviolet, the coated phosphor powder inside the glass tube converts the ultraviolet into visible light to illuminate the lamp. L type germicidal lamp is used to disinfect air, water and surface where ozone production is not desired, such as UV water purifier used at home Please see below graph I for the spectral energy distribution of ozone free UV lamps. VH lamps produce ozone to oxidize hydrocarbons to get TOC (total organic carbon) reduction water used by industries such as semiconductor industry, where super-purified water is necessary. It is indium doped amalgam lamps that are made for the optimum operating temperature of 100-120 a„? so that it can be made into high watts lamps The lamps are designed primarily for use in wastewater and municipal drinking water treatment. Lamp life is governed by tile life of the electrodes and is affected by tile frequency of starting.
The preheat circuit requires four electrical connections per lamp and a slight to moderate delay is needed to start the lamp Due to increased circuit complexity, reliability is regarded as slightly less than slim-line or cold-cathode instant-start circuits. If you'd like to get the additional items you've selected to qualify for this offer, close this window and add these items to your cart.
Contact the seller- opens in a new window or tab and request a shipping method to your location. Packaging should be the same as what is found in a retail store, unless the item is handmade or was packaged by the manufacturer in non-retail packaging, such as an unprinted box or plastic bag. In 1801, Johann Wilhelm Ritter, a German physicist, discovered that these invisible lights rays were very effective at darkening silver chloride soaked paper, and named them, "deoxidizing rays" to distinguish them from the heat rays at the other end of the spectrum.
UVC light waves, which are the shortest and most powerful in the UV range, have germicidal properties, and are capable of breaking down the DNA of microorganisms such as viruses, bacteria, dust mites and other allergens and contaminants.
The Oreck Halo Vaccuum,Verilux UVC Sanitizing Wand and the Raycop Anti Bacterial Bed Vacuum are 3 products currently available to consumers that can safely eliminate invisible allergens and contaminants in areas that chemical cleaners would be completely unwelcome. Several international studies have concluded that exposure to these allergens in the first two years of life can jump-start these life-long chronic conditions. While germicidal lamp uses high purity quartz glass tube which transmits the highest possible ultraviolet.

However, scientific research shows that these processes have bad effect on health and environment. This radical oxidation technology is called Advanced Oxidation Process (AOP) or Advanced Oxidation Treatment (AOT). VH lamps are also used to treat soil and groundwater contaminated with petroleum hydrocarbons, metals, VOCS, TNT in Advanced Oxidation Process (AOP) and Advanced Oxidation Treatment (AOT). The physically identical amalgam lamp omits 55% more UV when the input current is increased from 425mA to 900mA, while the UV output of the normal germicidal lamp is decreased. The lamps provide the equipment manufacturers the benefit of designing equipments to achieve the required disinfection rates by using fewer lamps and fewer Supporting components, The VHO lamps are less sensitive to the varying water temperature which allows lamp effectiveness to be maintained. If you reside in an EU member state besides UK, import VAT on this purchase is not recoverable.
These chemically reactive light rays were referred to throughout most of the 19th century as "chemical rays" and eventually dubbed "ultraviolet rays" while" heat rays" became known as infrared radiation. UVC light has been used for decades to sanitize surfaces and tools in medical labs and to sanitize water in water treatment plants. UVC light destroys the DNA of allergans and microorganisms, such as lice, fleas, mold, bacteria and viruses, including influenza.
Please keep these products away from children and read all operating manuals thoroughly before use. Chlorine has reaction with the substances in the water and form residues and by products which do damage to the environment and health.
One of ozone's advantages is that it can be carried by air into places that the UV radiation cannot reach directly. Many spring water bottlers now utilize UVC light to disinfect bottles and sterilize equipment and increasingly, public water treatment facilities are utilizing UVC technology to upgrade safety standards for drinking water.
The benefits of germicidal UVC light are fairly obvious for households in which children and pets, as well as adults do not want to risk exposure to either harmful microbes or potentially toxic chemical disinfectants.
Furthermore, some pathogens have already developed resistance to chlorine, calling into the question the success of the disinfection process. Ozone in conjunction with hydrogen peroxide (H2O2) produces highly energetic particles called hydroxyl radical (OH).
These products will clean, sanitize and eliminate odors from household surfaces without adding additional pollutants to the household environment.

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