Stars.

On remembering one "fireflyer" high in the tree, whose lamp stayed lit for nearly ten seconds ...

Fireflies in the Garden

Here come real stars to fill the upper skies,
And here on earth come emulating flies,
That though they never equal stars in size,
(And they were never really stars at heart)
Achieve at times a very star-like start.
Only, of course, they can't sustain the part.

- Robert Frost

Thanks Drew and Zuzu, that was a blast.