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светобоязнь
nikkou kyouhusyou : hikari tuu syou : kirari zyo kyouhusyou
световод
hikari doutai : raito paipu : doukouban : paipu tenkayou koyori
световое пятно
bi-mu ・ supotto : kouten : supottoraito
световой поток
kousoku : hikari netusyuturyoku : kousoku