As an expert in the field of indoor air quality, I am often asked about the effectiveness of UV lights in eliminating harmful pathogens. One question that frequently comes up is whether or not UV lights should be left on all the time. In my professional opinion, the answer is a resounding yes. One important reason to keep UV lights on continuously is to prolong the lifespan of the ballast or controller. Turning the system on and off frequently can cause wear and tear, leading to a shorter lifespan.
Additionally, leaving the lamp in the UV system for more than 12 months can also have a negative impact on its longevity. But more importantly, UV lights need to be continuously on in order to effectively kill microorganisms. This is because UVC rays, the type of ultraviolet light used in these systems, must directly radiate onto germs in order to be effective. While reflected UV light can also have an impact, it takes longer and must be closer to the source of reflection. This means that smaller residential systems may not be as effective as larger commercial ones, as it takes longer for all of the air to circulate through them. However, this does not mean that residential UV systems are not effective at all.
In fact, they can significantly reduce the viral and bacterial load in indoor air over time. According to the EPA, passing all of the air through UV light can remove up to 99.9% of pollutants. For those using UV sterilizers for aquariums, it is crucial to keep them on 24/7.The only exceptions would be during initial setup before adding fish or when using certain medications that require the UV rays to be turned off. It is also important to regularly clean the quartz cover, as any buildup of lime or dirt can hinder the effectiveness of the light. But UV lights are not just beneficial for aquariums. They can also greatly improve indoor air quality in homes.
By continuously cleaning the air, UV lights can eliminate irritating pathogens and reduce allergens, making it easier for those with respiratory issues to breathe. And in times of illness, the combination of UV light and air conditioning can help circulate and destroy any bacteria that may be present in the air. Now, back to the question at hand: should UV lights be left on all the time? The answer depends on the type of system and the volume of air passing through it. As an expert, I cannot stress enough the importance of using a UV light with sufficient strength to effectively destroy bacteria and viruses. This is why it is crucial to choose a reputable brand and model. In fact, laboratory tests conducted by Westinghouse Electric, General Electric, Pennsylvania State University, and Harvard School of Public Health have all shown the effectiveness of UV light in eliminating microorganisms.
So if you want to ensure that your UV light is doing its job, it is best to keep it on all the time. Of course, this does not mean that you should leave your UV light on if it is causing your electricity bill to skyrocket. In such cases, it may be necessary to turn it off temporarily. However, this should not be a long-term solution as it gives mold and other harmful pathogens a chance to regroup and continue circulating in your indoor air.
