FACTS ABOUT OUR Insect Killers

Precept Hygiene Insect Light Trap (ILT) products uses UV Light to attract flying insects and isolate them from your workplace, food processing, and front of house areas. To better explain how ILT works, let us define what UV light is and how our bulb attracts flying insects.


What is UV Light?
Ultraviolet light is not visible to the human eye but can be found slightly to the right of visible light on the light spectrum. Measured in nanometers (1 nanometer is 0.00000001 meters), UV light has a wavelength lying between 100 and 400 nanometers in length.
The UV spectrum is further divided into three areas, namely:
UVC, also known as Germicidal Radiation, lies in the spectrum between 100-280nm and is used for purification of air, water and surfaces.
UVB is used for tanning purposes and has a wavelength between 280-315nm.
UVA, sometimes referred to as black light/blue, lies between 315-400nm and is used within the insect control equipment.
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 source 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 (only 2-3mgs).
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.
UV Light Bulbs
Insects are attracted to all light but over the years research has proven that insects are particularly attracted to blue ultra violet light at a UV wavelength of approximately 350/360 nanometers:
Please note that all bulbs have a lifetime of approximately 12 months. After this, they become less insect attractive and should be replaced.
All our units are now fitted with high-powered Actinic tubes, the result of a recent breakthrough in UV technology where each tube will always peak at 360 nanometers to create the largest output of light available in the industry.
Benefit 1 –  Improved performance against time.
– Actinic tube remains effective for 40%  longer  than BL350 tube (ordinary UV)
Benefit 2 -  Higher light UV output than BL350 tubes
- UV levels peak at 365 nm, proven to be the most attractive wavelength for flies




Catch System
The fly either gets caught on the sticky glueboard, ‘zapped’ on the electronic grid or drawn to the fan and falls into a deep catchment tray.