The effectiveness of the germicidal UV is determined by the time the body is exposed to the light. The wavelength and the intensity of the light are also other important determinants of the entire result. Other things like the presence of particles can play a significant role in determining the right results. in order to make sure the results are carefully correct, the air or water is repeatedly exposed to the UV light to make sure that a significant number of microorganisms are exposed to the light. Many times sterilization is quoted as being achievable. in most cases it was difficult to achieve sterilization and that is why many companies use the word disinfection in order to avoid misusing words. There are other service providers that will say that that effectiveness is up to 99%. A cell can use UV light to repair damaged DNA. They do that through what is known as light and dark repair. The side of the exposure to the UV light is the one that will determine how efficient the process is for the right results. If the bulbs have some dust coating it will lower the effectiveness. In order to increase the effectiveness, the bulbs have to be often cleaned.
The other thing that will have to be done is to make sure the bulbs will be changed. The design of the germicidal bulbs determine how long they will live. They are also affected by the different materials used. When there is airflow it cools the lamp making the output of the UV to go down. Therefore it means that it is important to shield the lamps flow airflow so that cooling does not take effect because if it does it will lower the effectiveness of the UV. Reflection is one of the ways that can be used to enhance the efficiency of the UV. The results can be highly enhanced by the use of aluminum which is highly reflective. If you want to evaluate the efficiency of the UV in water disinfection, you can calculate the dose.
All these processes need a lot of care if you are to get the right results because a slight interference in the process will give completely different results. It is dangerous to get results that are far from the truth because that will mean the decision that are made are not correct and they will not have the intended effect. That will mean that the product that is made out of those conclusions may not be used for consumption depending on the deviation of the results or the effect of the interference experienced. That is why some processes have to have regulatory bodies to make sure everything is done in the right way.