But such a fierce, little, rapid, sparkling, energetic, she-devil I never beheld. She was alight and flaming, all the time.

the idle pennings of a poetic daydreamer

Bless you, good father friar!

LBP binds luciferin at pH 8.0 but not at pH 6.3 (10); upon acidification of the scintillon, the luciferin is therefore released for reaction with an activated LCF.