Precept Hygiene Products List

Precept Hygiene Product Facts

What is UV light?

Ultraviolet light is not visible to the human eye, but can be found slightly to the right visible light on the light spectrum. Measured in nanometers (1 nanometer is 0.0000000,1 meters), UV light has a wavelength lying between 100 and 400 nanometers in length.

The UV spectrum is further divided into three areas namely:



Also known as Germicidal Radiation, lies in the spectrum between 100-280nm is used for purification of air, water and surfaces.



Used for tanning purposes and has a wavelength between 280-315nm.



Sometimes referred to as blacklight/blue, lies between 315-400nm and is used within the insect control equipment.


Precept Hygiene Product List - Product Facts


Why are insects attracted to UV

The eye of the fly is made up of hundreds of tiny hexagonal lenses, which form a curved lattice across the eye. Unlike humans, flies can see ultraviolet light, due to the complex make up of their eyes. 


All light sources emit some level of UV and it is this UV that flying insects actively search out, mistaking it for the sun’s rays. Flies are most attracted to UV light between 350 and 370 nanometers in wavelength, most noticeable at 365nm. This UV peak falls in the middle of the UVA spectrum.


How does a UV Bulb work

UV Light is created from a fluorescent tube, containing a mixture of inert gases, a phosphor coating and a tiny amount of mercury (only2-3mgs) 


When the tube is fed electricity, the current flows through the gas mixture, which acts both to conduct the electricity and ignite the tube. The mercury atoms absorb the energy of the current. This causes the atoms to become unstable.

To regain their stability, the mercury atoms must lose this excess energy. They release this energy in the form of UV radiation.

Once created, the UV radiation attempts to escape the confines of the phosphor coated glass tube. Depending on the variant phosphor, the thin coating allows the desired wavelength through and absorbs the rest. This enables the tube to be tailored to release the precise level of UV.


How does an insect killer work?

Insect Killers utilise ultraviolet tubes to attract flying insects into the product, before either zapping them dead on a high voltage killing grid or trapping them on a sticky glueboard. UV tubes attract flying insects by emitting a wavelength of light attractive to flies, between 350 – 368nm. Flying insects are attracted to the tube which emits UV at a level comparable to that of the sun, which the flying insect has a natural attraction to as a source of heat.[source]


Why do I need an insect killer?


If you want to ensure a safe area for your family and workplace, you need an insect killer.  Insects bring with them diseases from dengue to e-coli. These pests typically visit animal droppings or trash cans, and then fly around your area , Bathroom decorating ideas made easy spreading germs that they have picked up on their feet or mouths.


What insect killer should I install in my application?

Choosing the appropriate insect killer for your application will help ensure your environment is correctly protected from flying insects. Each insect killer has a recommended coverage area based upon UV light output, specification and design. As a general rule, zapper insect killers are ideal for backroom areas with high numbers of flying insects, while glueboard insect killers are appropriate for sensitive applications such as food preparation areas. Front of house and domestic areas often require a decorative solution, providing discreet but effective insect control. In commercial applications, insect killers should be supplemented with preventative barrier protection, in the form of insect control chains, screens and insecticide to repel and stop the insect entering your premises.[source]


Where can I place the insect killer to make it more effective?


Each situation requires an individual assessment for insect killer placement; however, there are basic principles that should be followed:

  • Recommend enough insect killer to cover the area to be protected

Install insect killer away from sources of light competition, such as windows, doors and high powered lights. Wherever possible, insect killer should be positioned at 90° to sources of natural light, such as windows, doors and skylights.

  • Don’t install zapper type insect killer directly above sensitive areas, such as food preparation areas and instead use glueboard units.
  • Consider access for installation and future servicing (bulb/glueboard replacement)
  • Insect killer should not be placed either too high or too low in the area to be protected, with an optimum height of around 2 meters.



What is a Glueboard?    

A glueboard, also known as sticky board or glue pad, is piece of cardboard with a very heavy adhesive on one side. It is placed inside the unit to trap the insects without the zapping noise. 


How often should a glueboard changed and why?   

Glueboards are effective for thirty days and as such should be replaced every month or more frequently if manifestation of insects is high.


How often should UV tubes be changed and why?   


We recommend that UV tubes are changed every 12 months to ensure maximum efficacy.


The levels of UV produced by fluorescent tubes deteriorate rapidly throughout the life of the tube. While the tube will continue to glow blue or green indefinitely, after approximately 8,000 hours the amount of useful UV (which humans cannot see) drops to a level where it is no longer attractive to flying insects.  As a result, UV tubes must be replaced annually to ensure they remain effective in producing useful level s of UV. This replacement cycle is typically under taken just before the peak insect season, to ensure the insect light trap is producing the maximum amount of UV throughout the critical insect season.


Why isn’t my insect killer catching any flies?

Insect killers require maintenance to ensure they are kept working at optimum efficiency. UV tubes have an effective life of approximately 8000 hours, and as such should be replaced at least once a year, ideally before the summer season. GLUPAC branded glueboards incorporate UV stable glue with impregnated pheromones to further attract flying insects. However, glueboards have an effective life of approximately thirty days and as such should be replaced every month to ensure the glue effectively retains the caught insect. Insect killers should be installed in a location most suited to increasing the efficacy of the product.[source]