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Frequently Asked Questions about UVC


Q. Can UV Kill Coronavirus?

Yes! It is true, sterilization of air and space is being created using UVC lights, Indeed it is proven case for killing virus and bacteria’s of 65 types of families, UVC with wavelength 253.7 nm

Q. How does UV light kill bacteria?

UV technically doesn't "kill" bacteria, but rather it inhibits replication, or sterilizes it, by destroying the DNA. A more detailed explanation is that the UVC energy is absorbed by the DNA and RNA contained in the cells, and this creates dimers or a "double bond" between adjacent nucleotides (i.e. thymine). The formation of these dimers is what inhibits the ability of the chain to replicate, which in turn leads to the death of the colony.

Q. Where should Germicidal UV-C Light system shall be used ?

 UVGI has been recommended or used for the isolation of disease and bio-defense systems for buildings by the many authorities United States Army, The CDC, FEMA etc,

Q. How long does UV light take to kill bacteria?

Effective deployment of UVc for disinfection or sanitization or sterilization depends on   



●Time(length of exposure) ●Distance(how far is source from target)



The short answer is - minutes –

The good news is bacteria, and viruses, are very susceptible to UVC energy, especially when compared to a spore former, like C-diff.

Luminosity Lights is aware of the complexity of the answer to the length of time needed, Based on above inputs we offer solution for your need.

Q. Is UV light safe?

We say safety from Virus as well safety from UVC needed With proper PPE, UVC is completely safe when the eyes and skin are protected. Without any PPE, prolonged, direct exposure to UVC light can cause temporary skin redness and eye irritation, but does not cause skin cancer or cataracts.

Q. Can UVC be used on the human body to disinfect against the coronavirus?

Luminosity Lights strongly advised not to apply e use of UV light directly on the human body at the wavelengths and exposures proven to efficiently kill viruses such as SARS-CoV-2.

Q. Do germicidal lamps kill viruses?

Yes it is true -germicidal UVC lamps are creating sterilization level environment from most viruses, airborne bacteria and mold spores.

Q. How often do the lamps need to be replaced?

Luminosity Lights using Germicidal UVC lamps of Philips/Osram make, which are good for approximately 8,000 hours (one year) of continuous use, with only 20% decrease in output over life

Q. How much intensity do I need to kill certain organisms?

The exposure of UVC light is the product of time and intensity which are inversely proportional to each other mean particular space to be sanitized in quick time then selection of  light fixture will be high , if wattage are low time will increase for disinfection effect, High intensities for a short period and low intensities for a long period are fundamentally equal in lethal action on bacteria. the killing power decreases as the distance from the lamps increases.

Q. Can germicidal lamps be turned on and off continuously?

   Yes UVC lights switching cycle can be designed as per sanitization cycle desired,

Q. How do germicidal lamps kill?

Ultraviolet light in the germicidal wavelength - 185-254 nanometers - renders the organisms sterile. When organisms can no longer reproduce, they die.

Q. How hot to the lamps get?

Germicidal UVC lamps do not produce much heat - about the same as fluorescent lamps.

Luminosity Lights advised not to touch tube surface directly during run of light or after.

Q. To be effective, how close to the surface do the lamps need to be?

The exposure of germicidal ultraviolet is the product of time and intensity. High intensities for a short period and low intensities for a long period are fundamentally equal in lethal action on bacteria. The inverse square law applies to germicidal ultraviolet as it does to light: the killing power decreases as the distance from the lamps increases. The average bacterium will be killed in ten seconds at a distance of six inches from the lamp .

What damage will the lamps do to me?

Direct exposure to UVC light can cause skin redness and eye irritation temporary, but does not cause skin cancer or cataracts.

Luminosity Lights and systems are designed with safety in mind and, when properly installed do not allow exposure to ultraviolet irradiation and allow for safe operation and maintenance.

If you are exposed to direct germicidal light, it can burn the top surface of your skin. If your eyes are exposed, it would be similar to a "welder's flash", and your eyes can feel dry or gritty. At no time do germicidal lamps cause any permanent damage.

Luminosity recommends not to look UVC light directly at any time.

Q. What effects does UV light have on surrounding materials?

No measure changes observed to interior stuffs as switching cycle is in minutes and on intervals,

Fruit and vegetables are safe to use UVC disinfection,

Q. Can germicidal UVC penetrate surface or substances?

Absolutely No - germicidal UVC sterilizes only what it comes in contact with. If you have a room sterilizer, such as one of our Table top series, it is not penetrating to any object, neither any effect recorded yet for shape/color deformation to objects by researchers,

Q. How do you determine the square footage that one germicidal UVC lamp will cover?

Our table top lights has been designed for fixed area utilization considering minimum to maximum for fixed durations

24 watt model covers -150 sqft

33 watts model covers-250 sqft

48 volts model covers-350 sqft

Fixed time of 10 minutes will make sterilized effect in proposed area.

Q. How are UVC lamps used to disinfect the air?

Luminosity lights have wide range for products for confined space to larger indoor /outdoor areas to air and surface disinfection ,

Range includes Ceiling/surface mounted, movable, retrofitted fixtures for HVAC industry equipment like AHU’s/TFA’s and other equipment’s

Integration of lights and system being proposed on application based services.

Q. What safety precautions should be taken when using germicidal UVC?

In personal protection applications (the use of lamps for room irradiation in homes, schools, offices, etc.),Direct ultraviolet irradiations, In such installations, personnel should be protected by wearing either goggles or face shields, during operation if needed to enter the area,

Additional features for safe operations has been incorporated with buzzer sound, IR based remote control for switch on/Off operation,

Most fixtures are inbuilt with three time setting 5/10 and 15 minutes after preset time limit lights goes off automatically.

Are UVC lights safe for fruits and vegetables disinfections?

Yes , it is safe to use for liquid and solid stuffs,

Q. Are UVC lights kills insects also?

Ultraviolet light does kill insects as well, and it's commonly used in quarantine labs to keep potentially dangerous insects from escaping into the environment. ... It turns out that UV light isn't the only harmful type of light. It also turns out that blue light might kill insects as well. Scorpions glow under UV light

Q. What percentage of UV light is blocked out by glass?

(This is one of many questions posted on an interesting Web Site that should be great for elementary and secondary school students, not to mention adults as well!)

Normal glass (as used in windows) is transparent to UV radiation to a wavelength of about 330 nm (UV-A). The transparency is quite high so almost all UV-A light will pass through glass. Below 330 nm (UV-B and UV-C), almost 100% is block by normal glass.

Q. What is the difference between a blacklight and a bluelight?

A "black light" is a fluorescent light tube that emits at about 365 nm - this is just below the wavelengths that humans can see, but it is absorbed by most pigments in clothes so that they "fluorescence". This is the effect seen in many bars and discos.

I'm not sure what you mean by a "bluelight" - perhaps you means "germicidal" low-pressure mercury lamp. They do glow "blue", but most of their output is at 254 nm, so DO NOT look directly at such a lamp when it is operating. These lamps are used in air and water disinfection, since the 254 nm light is absorbed by DNA in bacteria and viruses causing their inactivation.

Q. Is it possible to use UV lamps to protect postal workers from the terrorist threat of Anthrax contamination of mail?

Very little is known about the inactivation of Anthrax spores by ultraviolet light in air. One would have to arrange that the UV irradiance would be high enough so that the spores would receive a sufficient UV dose. If one were to set up such an arrangement, there would have to be safeguards to avoid exposing the workers' eyes to UV and also the workers should wear latex gloves to block UV from exposing the skin of the workers.

Q. what effect would the UV light have on the PVC?

PVC (polyvinyl chloride) blocks (or totally absorbed) the 254 nm ultraviolet light from a "germicidal" UV lamp

Q. UVC with ozone or UVC Ozone free tubes shall be used?

UVC ozone free shall be used as whether in its pure form or mixed with other chemicals, ozone can be harmful to health. When inhaled, ozone can damage the lungs. Relatively low amounts of ozone can cause chest pain, coughing, shortness of breath and, throat irritation.

This occurs because UVV light reacts with oxygen to break it into atomic oxygen, a highly unstable atom that combines with oxygen to form O3 (ozone). ... The longer (253.7 nanometers) wavelength of UVC light, by contrast, provides highly effective air and surface disinfection without producing any harmful ozone.

Why shop from LED Uncle? LED Light

LEDUNCLE is an online international e-commerce LED light platform started by Luminosity Solutions. We are prominent manufacturers and wholesalers of a wide range of LED lights. LED Uncle offers a wide range of LED Lights that are exquisite, have longer durability and are energy efficient. The website mainly focuses on the online shopping of LED lights in India and abroad. We offer all kinds of Lights indoor lightsoutdoor lightscommercial lightsresidential lightsdecorative lights. We assist in online shopping without causing any inconvenience. It is one-stop for all LED Light products varying from LED Batten LightsLED Bollard LightsLED BulbsLED Flood LightsHigh Bay and Low Bay LightsUp-down Lights and strip lights.

Users can go through our site and gain knowledge about all LED products that are available at us. We accept all kinds of electronic payments from around the world. LED Uncle was started to meet customer requirements and making our customers our priority. LED Light known as the energy-efficient bulb in the word of lights is the easiest way to save up energy. We have made our products with advance technology and have kept the price pocket friendly for our customers. At LED Uncle we have use high quality LED chips in our led lights that result into minimal driver failures and its replacements. All our products have Surge Voltage Protection which will protect from voltage spikes. LED lights produces 90% more energy as compare to incandescent light bulbs. Led lights are even eco-friendly as compared to other alternatives. At LED Uncle we provide our customer a high quality and advance technology without even burning a hole in your pocket.

Indoor Lighting

We want to provide our customers best services and latest technology. Our indoor lights can be used for a longer duration and it provides the best performance. The affinity of our products have been tested and approved in respect of the latest quality of international standard requirements. We at LedUncle use standards like EMC,LVDD and ROHS etc. in the process of manufacturing keeping global warming in mind.

Outdoor Lighting

LED lighting is the new and fastest form of lighting which is accepted globally as it doesn’t harm the earth, it doesn’t overheat and doesn’t start burning out. Manufactures are creating different sizes, shapes and designs of the led lights not only to illuminate the area but also led’s are eye catchy because of their designs.

Outdoor lighting plays a crucial role in transforming and lighting the external architecture. It gives a total new look of the area. Outdoor lighting is very much important for all of us as it provides a safety on roads, creates rapture environment, makes the architecture look more appealing, enhance the beauty of particular area, provides better vision in night, it extend the efficacy of human activities, etc.

Commercial Lighting

Commercial lights are mostly use in offices, malls, stores, institutions, etc. they are used in a manufacturing/ industrial or non- residence. Keeping industrial needs in mind LedUncle provides led commercial lighting and designed in such a way that they matches your requirement.

Residential Lighting

We spend our most of the time in our residence only it’s important to have a proper lighting. An adequate lighting turns a house into home. We provide our customers a proper led residential lighting so that they can stay focus, calm, relax and help in doing their work cycle. Experts says that indoor lighting has a direct connection with the human psychology.

All our products are BIS certified and IP rated for its usages which simply means your safety and comfort is our first priority. Superior quality at best price.

HOW UVC(Ultraviolet) light KILLS VIRUS

UVC wavelength is scientifically designed and proven technology to kill bacteria, viruses and other harmful microorganisms that pose a risk to human health. Ultraviolet (UV-C) light kills or inactivates microorganisms by destroying nucleic acids and disrupting their DNA, leaving them unable to perform vital cellular functions.

UVC germicidal lamps with engineered systems reduce infection caused by airborne transmission of bacterial pathogens within built environments. Furthermore, some of the water we drink has been disinfected using UVC light, as has a wide variety of food, drink and medical supplies.

UVC germicidal lamps have been used for disinfection of air and surfaces within
● hospitals,
● care homes,
● laboratories ,
● school/college/universities
● corporate offices/Malls/cinema halls/Trains/Metros
● Airports, and many other places for having hygiene and cleanliness are of utmost importance in current situation of COVID-19 Coronavirus outbreak

Advantages of UVC Lights

• Chemicals are not used and hence no chemical by-products are generated in the finished product.

• Disinfected materials are not heated.

• Uses non-ionizing radiation hence not residual radioactivity is delivered to the product.

• Effective to remove most microorganisms.

• Can be used for liquid and solid materials.

• Quality characteristics are preserved.

• UV-C radiation sources are easily available at a reduced cost.

• Low energy needs.

• Non transparent liquid foods, having low UV radiation penetration depth, are fully sterilized.

• It is an alternative to thermal processes because it provides similar results being less aggressive to the product characteristics.

• Low cost and effective technology.

• UV disinfection can be implemented anyway in the production process.



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