Lineup of High-power UVC LED Assembly Products

Test 1: Test on the inactivation effect on SARS-CoV-2
Summary and results of the test
Method: UVC light is lit from the height of 5 cm/15 cm and the time required for inactivation is measured
　　　　by TCID50 measuring method.
　　　　UVC illuminance for 5 cm/15 cm was 0.4730mw/ cm2 and 0.0518 mw/ cm2 each.
Results: From the height of 5 cm, inactivation of 99.9% after 10 seconds, and inactivation of 99.99%
　　　　after 20 seconds was confirmed.
　　　　From the height of 15 cm, inactivation of 99.9% after 100 seconds, and inactivation of 99.99%
　　　　after 200 seconds was confirmed.
　　　　The irradiation dose required for inactivation of 99.9% was 4.73mJ/cm2.
　　　　The irradiation dose required for 99.99% was 9.46mJ/cm2.

Test 2: Inactivation test against SARS-COV-2 by using two LEDs with different peak wavelengths Summary and results of the test
Method: UVC light of 265 nm and 275 nm each is lit from the height of 20 cm and the time required for
　　　　inactivation is measured by TCID50 measuring method. Drive conditions were adjusted in
　　　　order to achieve UVC illuminance of 0.025mw/ cm2 for both LEDs.
Results: As for 265 nm, from the height of 20 cm, inactivation of 99.9% after 300 seconds was confirmed.
　　　　The irradiation dose required was 7.5mJ/cm2.
　　　　As for 275 nm, from the height of 20 cm, inactivation of 99.99% after 600 seconds was
　　　　confirmed.
　　　　The irradiation dose required was 15.0mJ/cm2.
From the above results, it was confirmed that LED with 265 nm peak wavelength, which is used for
our product, is able to achieve an inactivation effect in a shorter time (about half).

* Fujita Health University
Fujita Health University is actively working on research and development targeting SARS-CoV-2. At the time of the spread of the infection on the passenger ship Diamond Princess in 2020, the university admitted infected patients and provided medical institutions in Japan with information about pioneering cases useful in preventing the spread of the infection. The cases were called “the Fujita Model.”

Supplementary material
Test 3
Summary and results of the test
Method: Illuminance of UVC light with 265 nm wavelength was adjusted to a lower degree,
　　　　0.016 W/c㎡. Then, UVC light is lit from the height of 20 cm and the time required for
　　　　I inactivation is measured by TCID50 measuring method
Results: Inactivation of 99.99 % after 600 seconds was confirmed. The irradiation dose required was 9.6
　　　　/cm2.It was confirmed that with 265 nm wavelength, even by illuminance of 0.016mW/ cm,2
　　　　inactivation effect equivalent to that of 0.025mW/c㎡ in Test 2 is achieved.

*Information provided on this news release was accurate at the time of announcement.  Design of the product, date sale, specifications, etc. may change.