Tsurumoto, Tomohiro
Fujikawa, Yasuo
Onoda, Yushi
Ochi, Yukari
Ohta, Daisaku
Okazawa, Atsushi
Article History
Received: 13 March 2021
Accepted: 28 February 2022
First Online: 12 March 2022
Competing interests
: Tomohiro Tsurumoto, Yasuo Fujikawa and Yushi Onoda are employees of Nichia Corporation. The other authors declare no conflicts of interests associated with this manuscript.