Like LUMINOUS fish.
The Big Bang Theory Season 1, Episode 4
I was working with LUMINOUS fish
and I thought, "Hey...
The Big Bang Theory Season 1, Episode 4
...LUMINOUS paint
will guide you to the nearest exit.
The Big Bang Theory Season 4, Episode 24
Don't you worry about the residual radium
from the LUMINOUS dials?
The Big Bang Theory Season 2, Episode 1
I read an article about scientists
who inserted DNA from LUMINOUS jellyfish...
The Big Bang Theory Season 1, Episode 4