Bright light flashes of 0.5 milliseconds reset the circadian clock of a microchiropteran bat

A phase response curve for the circadian rhythm in the flight activity of the cave dwelling bat, Hipposideros speoris, constructed with 0.5-msec light flashes of very high intensity reported here is the first of its kind for any mammalian system and is unlike any other phase response curves constructed for other nocturnal mammals.