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What's the difference between UV-C and Far-UVC? <br />Page 4 of 5 <br />• Constant disinfection — Because far-UVC is safe for skin and eyes, products <br />can run constantly. They can work at all times to kill pathogens like viruses <br />and bacteria so you are never starting from ground zero. UV-C products only <br />target germs during a timed cycle when no one is in the room. <br />Cons of far-UVC <br />Limited testing — The biggest concern from industry experts about far-UVC is <br />limited testing on humans. Although studies on mice show no long term <br />effects, there are no studies on the long term effects on humans. <br />Slow disinfection — Right now, there are limits to the amount of UV energy in <br />a space, which requires far-UVC products to operate at a very low dose over <br />a long period of time. For example, the Space Downlight by Health& Lighting <br />delivers a dose of 23 mJ/cm2 over the course of an eight hour day. That dose <br />is to a surface three feet below the downlight. 23 mJ/cmz is the threshold limit <br />value for occupied spaces. <br />Limited product offering — Because far-UVC technology is so new, there is <br />limited product offering. There are only a few manufacturers producing far- <br />UVC products, and you want to make sure you choose a trusted and <br />reputable manufacturer. Even manufacturers producing far-UVC only have a <br />few fixture options. This is likely to change in the next few months and years. <br />products products <br />Now that you know the pros and cons of UV-C and far-UVC, how do they really stack up <br />against each other? <br />Here's a comparison chart: <br />UV-C <br />Far-UVC <br />Wavelength <br />254 n m <br />222 n m <br />Safe for skin and eyes <br />No o <br />Yes <br />Track record <br />1 Op+ years <br />1 O ears <br />Product availability <br />Wide range <br />Limited <br />We will most likely see more far-UVC products on the market in the months and years to <br />come as more manufacturers focus on the technology. Scientists are continuing their research <br />into safety. <br />https://insights.regencylighting.coin/uvc-vs-faruve 11/11 /2020 <br />