They're shootin' at the lights.
3 seconds sound clip from the Die Hard (1988) movie soundboard.
You can hear this line at 01:12:28 in the Blu-ray version of the movie.
Quote context
[...]
- Okay, we're all set. We're ready.
- Go!
- It's panic fire. They can't see anything.
- They're shootin' at the lights.
- They're going after the lights. Pull 'em back.
- Don't be impatient. Just wound them.
[...]