tsukiyotake
... that one can reportedly see 8 mm (0.31 in) high Roman characters by the light of a 100 cm2 (16 in2) piece of the bioluminescent tsukiyotake?
... that one can reportedly see <span about="#mwt20" data-mw='{"parts":[{"template":{"target":{"wt":"convert","href":"./Template:Convert"},"params":{"1":{"wt":"8"},"2":{"wt":"mm"},"3":{"wt":"in"},"abbr":{"wt":"on"}},"i":0}}]}' id="mwAfE" typeof="mw:Transclusion">8</span><span about="#mwt20" typeof="mw:Entity"> </span><span about="#mwt20">mm (0.31</span><span about="#mwt20" typeof="mw:Entity"> </span><span about="#mwt20">in)</span> high Roman characters by the light of a <span about="#mwt21" data-mw='{"parts":[{"template":{"target":{"wt":"convert","href":"./Template:Convert"},"params":{"1":{"wt":"100"},"2":{"wt":"cm2"},"3":{"wt":"in2"},"abbr":{"wt":"on"}},"i":0}}]}' id="mwAfI" typeof="mw:Transclusion">100</span><span about="#mwt21" typeof="mw:Entity"> </span><span about="#mwt21">cm</span><sup about="#mwt21">2</sup><span about="#mwt21"> (16</span><span about="#mwt21" typeof="mw:Entity"> </span><span about="#mwt21">in</span><sup about="#mwt21">2</sup><span about="#mwt21">)</span> piece of the <a href="./Bioluminescence" id="mwAfM" rel="mw:WikiLink" title="Bioluminescence">bioluminescent</a> <b id="mwAfQ"><a href="./Omphalotus_japonicus" id="mwAfU" rel="mw:WikiLink" title="Omphalotus japonicus">tsukiyotake</a></b>?