(1) The firefly 's light is only visible for an instant.(2) The light from the firefly is an example of phosphorescence.(3) Later lab experiments showed that by flashing an artificial light at a firefly you could speed up its rhythm, you could slow it down, make it flash a little later than it would otherwise.(4) Triggered by dusk's fading daylight, male fireflies lift off into the air and begin their courtship.(5) We were guided as we went by millions of fireflies whose flashing marked the banks like landing lights on an airstrip.
📺 Word Example from TV Shows

Kind of like when
FIREFLY was cancelled.
The Big Bang Theory Season 7, Episode 17

FIREFLY did a movie to wrap things up.
The Big Bang Theory Season 6, Episode 21

He owns Fox
and they cancelled FIREFLY.
The Big Bang Theory Season 3, Episode 15

He begged the Fox network
not to cancel FIREFLY.
The Big Bang Theory Season 5, Episode 21

♪ I'd be FIREFLY, Buffy and
Avengers without Joss Whedon ♪
The Big Bang Theory Season 7, Episode 6