Germicidal Lighting

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Why is a short wavelength of UV light the most germicidal?

How do organisms deal with the effects of UV light?

Answers to both would be greatly appreciated.

(UV) Ultraviolet germicidal is a sterilization method that uses ultraviolet (UV) light at sufficiently short wavelength to break down micro-organisms. It is used in a variety of applications, such as food, air and water purification. UV has been a known mutagen at the cellular level for more than 100 years. The 1903 Nobel Prize for Medicine was awarded to Niels Finsen for his use of UV against tuberculosis.

UV Germicidal Lighting utilises the short wavelength of UV that is harmful to forms of life at the micro-organic level. It is effective in destroying the nucleic acids in these organisms so that their DNA is disrupted by the UV radiation, which is a form of ionising radiation. This removes their reproductive capabilities and/or kills them.

The wavelength of UV that causes this effect is rare on Earth as its atmosphere blocks it. Using a UV Germicidal Lighting device in certain environments like circulating air or water systems creates a deadly effect on micro-organisms such as pathogens, viruses and molds that are in these environments. Coupled with a filtration system, UV Germicidal Lighting can remove harmful micro-organisms from these environments.

The application of UV Germicidal Lighting to sterilization has been an accepted practice since the mid-20th century. It has been used primarily in medical sanitation and sterile work facilities. Increasingly it was employed to sterilize drinking and wastewater, as the holding facilities were enclosed and could be circulated to ensure a higher exposure to the UV. In recent years UV Germicidal Lighting has found renewed application in air sanitization.*****

Formore information pls.visit below source.

Bio-Fighter Lightstick Germicidal UV Light 24V, 16" Standard Lamp $5.00

Air Purifier UV Light Germicidal ultraviolet light -new $158.00

CVS SANITIZER SANITIZING WAND -Germicidal UV-C Light Technology- $9.59

US70059 ECOQUEST FRESH AIR UV Germicidal LIGHT BULB $6.42

25 watt Bi-Pin T8 Shape UVC Sterilizer Germicidal Light $13.50

G25T8 25W 25 watt UV Light Bulb Aquanetcs Germicidal $13.50

G25T8 25W 25 watt UV Light Bulb OmniZap Germicidal $13.64

CVS SANITIZER SANITIZING WAND -Germicidal UV-C Light Technology-X 2 $25.18

11W 11 watt G11T5 UV Germicidal Light Bulb Bi-Pin Base $10.49

14W 14 watt G14T5 / 4P UV UVC Germicidal Light Bulb $17.85

UltraViolet Light Purification 12 GPM $1,049.00 This modular (12) gallon per minute Ultra-Violet disinfection system incorporates our signaling ballast. That is right if something is wrong you get a warning signal. Stainless steel reactor vessel, quartz sleeve, electronic ballast and UV lamp are all included you need nothing more.This (12) gallon per minute system can be used as pre or post filter stage in any water treatment application. It i...

Philips 308643 - TUV15W G15T8 Germicidal Fluorescent Light Bulb $7.99 15 watt 18" T8 Medium Bi-Pin (G13) Base Hot Cathode Germicidal Sterilamp Fluorescent Philips Light Bulb...

Purely Products PUVH2309 9-Watt UV-C Germicidal Ultraviolet Replacement Bulb $8.91 Purely UV-C Replacement Bulbs G23 BasePurely UV-C Replacement bulbs offer a much higher concentration of ultraviolet light than even the sun, making them highly effective as a cleaning and purifying agent for pond and aquarium pumps and clarifiers.What is UV and How Does it Work?UV light is germicidal - i.e., it deactivates the DNA of bacteria, viruses and other pathogens and thus destroys their a...

Ushio 3000022 - GTL3 Germicidal Incandescent Light Bulb $10.49 3 watt 10.5 volt T6 Intermediate Screw (E17) Base Clear Germicidal Ultraviolet Incandescent Ushio Light Bulb...

Purely Products PUVH2307 7-Watt UV-C Germicidal Ultraviolet Replacement Bulb $9.79 Purely UV-C Replacement Bulbs G23 BasePurely UV-C Replacement bulbs offer a much higher concentration of ultraviolet light than even the sun, making them highly effective as a cleaning and purifying agent for pond and aquarium pumps and clarifiers.What is UV and How Does it Work?UV light is germicidal - i.e., it deactivates the DNA of bacteria, viruses and other pathogens and thus destroys their a...

Eiko 00219 - G14T5/4P Germicidal Fluorescent Light Bulb $25.99 14 watt 11" T5 4-Pin (G10q) Base Germicidal Fluorescent Eiko Light Bulb...