Frequently Asked Questions

How much power does Nemesis use?

Nemesis UVC Tower is 7 amps @ 120v

Nemesis Rack is 14 amps @ 120v

How many units will we need?

Contact a Nemesis supplier for an initial pre-phase design to determine your coverage per building and supply a rough quote.

How long do they run?

This is solely determined by the space that is being cleansed.

Does having “other” lighting on at the same time impact effectiveness?

No, however it is recommended to have a dark space as it deters people from entering.

What impact does dust have on them?

The Tower and Rack just need normal wiping down.

What about haze being in the air?

Limited effect, although with heavy haze it can reduce the transmission and effectiveness. No particles in the air are recommended.

Can a film be produced on the bulb?

No, the bulb / radiator is just a basic glass tube. It needs direct exposure. Glass and other material placed in front will block UV-C output.

How often do the bulb / radiator need replaced?

Recommended to replace once per year. Extreme usage, may result in shorter replacement time.

Do they produce heat? If so, how much?


Does it reflect off anything? Is there anything in the building that can absorb or otherwise impact its effectiveness?

UVC is reflective, especially off of white surfaces. UV-C cannot penetrate glass.

What wavelength do your units run at?

Nemesis Tower and rack operate in 250-270 Nanometer range.

Does temp or humidity impact it?

No effect on performance of disinfection. The towers and racks do have electronics and transformers that cannot exceed 40 degrees Celsius.

Can people be exposed? And what health impacts do they have?

Never allow humans to be in direct radiation of UV-C light. Since UV-C is not visible light, the fixtures have safety protocols built-in (occupancy sensors, red glow to indicate they are luminated, audible beep and beacon) to avoid exposure. Many studies have been done on the effects of UV-C and the results show minimal effect in the short term. Studies have shown damage to the eye can be an effect of exposure to UV-C light. It is required that humans and animals not be exposed.

What about items in the building not UV resistant?

Rubber, cloth seats, plastic, insulation, etc.

It is comparable to exposure to sunlight. Long term exposure may produce fading or degradation of some materials. Amounts of degradation are completely dependent on types and quality of materials and if they have UV-C protection built-in.

Is it FDA or EPA approved?

See link from an FDA about the use of UV-C and other items to combat Covid 19. Released in March 2020. The FDA approved a waiver on UV-A, UV-B and UV-C in the 1950’s. It has recently started recommending the use to combat against virus and bacteria for everyday use, not just high-risk areas such as hospitals.
What 3rd parties have tested this bulb and fixture and how can we see their results for a test that was done in our similar setting?

Bulb manufacturer, Philips, has extensive testing that is available. Bulb has been available for decades.

What are the results and/or feedback from existing units in the field?

There are thousands of these products in use worldwide primarily in the medical field. The towers and racks were just designed by Nemesis recently as a result of the lack of heavy-duty industrial type units on the market.

Do the lamps fade, dim or diminish in any way over time? Or lose effectiveness?

The Philips Radiator needs replacing once per year. Extreme usage, may result in shorter replacement time.

In Nemesis products user serviceable?

User may do minor repairs and lamp replacements. Extensive repairs must need to be done by a trained technician.

Are bulbs easy to re-order?

Yes. They are inexpensive. Similar to the cost of a Fluorescent tube.

What about wet surfaces?

No adverse effect. The product works faster on wet surfaces.

What about surfaces blocked by objects, such as under a seat or behind a door?

If properly laid out within a given space, exposures should cover all areas. UV-C can be reflected off certain surfaces and into non-direct areas. However, exposure will never get every inch under and around objects. Nemesis recommends providing normal cleaning with disinfectants first, then exposing the area to UV-C for a final cleaning.

Can bulbs break? Are they shatter proof? What happens when one does break?

Yes, they can break. The radiators are like a normal fluorescent bulb. Like Fluorescent bulbs, they have Mercury in them at 5%.

What are the disinfectant claims? What germs, bacteria and viruses does it kill?

The radiator we are using is a Philips product that has been around for decades. Nemesis recommends timings to kill at 255+ J/m2 (Joule per Meter squared) and the current Covid-19 strain is undergoing testing from various scientific organizations, at the moment it is believed to be killed in the 60-70 j/m2. See link for more information.

What size area does a single tower disinfect?

A single tower can treat a 40’ x 40’ area in 2 hours, however that number goes down drastically the smaller the space. For instance, a 20’ x 20’ room can be as low as 20 minutes. Nemesis Tower design of photometric overlap allows this quick disinfection range.

How long does a tower last?

The radiator lamps require replacement once a year. They are low cost.

The overall unit has a 2-year warranty. Transformer power supply has a lifetime warranty.

Any certified claims?

There are more than you can read about certified claims on the effects of UV-C. Nemesis products utilizes existing, proven UV-C radiators. We’ve designed and built a very robust way to utilize them with overlapping photometrics to increase the output of Nanometers thus decreasing disinfection time.

Benefits of UVC Technology

  • UVC radiation has been proven to be effective against waterborne and airborne pathogenic micro-organisms including those responsible for cholera, hepatitis, polio, typhoid, giardia, cryptosporidium and many other bacterial, viral and parasitic diseases
  • UVC installations have low capital and operation cost
  • UVC technology is environmentally friendly
  • UVC installations are easy to operate and to maintain
  • UVC radiation has no harmful effect when overdosed on surfaces, water or air
  • UVC radiation works instantly and the effectiveness does not depend on the temperature
  • UVC disinfection is a physical process: no substances are added
  • The UVC disinfection effect is directly related to the UV dose (which is the product of intensity and exposure time of the micro-organisms) so it’s effectiveness can be simply measured once the system design is validated


The information in this site has been compiled from reference materials and other sources believed to be reliable and given in good faith. All Nemesis product must be installed correctly and used properly to be effective. No warranty, either expressed or implied, is made to the accuracy and completeness of the information, nor is any responsibility assumed or implied for any loss or damage resulting from inaccuracies or omissions. If the Seller is not responsible for the installation, then the Seller will not be responsible for any damages caused by improper installation or usage. The Seller makes no representations, guarantees or assurances as to the effectiveness of using a UV-C lighting system for sanitization and is not responsible for any damages caused by any ineffective usage of the products. Purchaser understands and accepts that the use of UV-C lighting can cause fading and discoloration of some materials and that the Seller is not responsible for any damages whatsoever to any materials or equipment due to the use of the products.

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