light off
Upper Intermediate (B2)informal
To set something on fire to make it launch or explode, like a firework — or to leave fast.
"The kids were excited to light off the fireworks after it got dark."
Hear it in context

N3on Gets Invited to Wild 'n Out!
N3ON · 13:32
Probably light off.

Sneaking into Epstein's Temple
SideQuest Drew · 22:48
Turn the light off.

Sneaking into Epstein's Temple
SideQuest Drew · 32:09
Turn the light off.

Venomous Caterpillar, Toxic Worms & Blue Tarantula - Full 90 Minute Compilation
Brave Wilderness Top Videos · 47:25
Just light off now.

When Wildlife STRIKES: Coyote's Extreme Moments Compilation
Brave Wilderness Top Videos · 47:54
Great light off now.