It started with one trained husky and one very untrained German shepherd. It escalated into a weaponized light show aimed straight at the neighbor’s bedroom.

User 4aceswilldoit says they spent four weeks grinding through nighttime training with their husky so the dog could sleep outside without waking the neighborhood. Anyone who’s met a husky knows that’s not exactly beginner-level stuff. But it worked: the dog is “really well behaved” and quiet at night.

Then six months ago, the peace shattered.

The next-door neighbors brought home a German shepherd who, according to the post, “barks at everything and all night.” While the husky’s owner works rotating shifts and lives in “perpetual sleep deprivation,” the shepherd’s humans apparently decided training was optional.

OP didn’t start with chaos. They say they asked the neighbors several times to train the dog, even explaining how to do it and straight-up offering to train the dog themselves. Commenters were floored anyone would turn that down, with one saying they’d be “so stoked” to get that kind of help instead of complaints or cops.

The neighbors, according to OP, did nothing.

So the gloves — or rather, the lights — came off.

OP bought two 30,000 lumen floodlights, narrowed the motion sensor with a baffle so it only triggers when the shepherd runs to one specific barking spot by the fence, and aimed both lights directly at the neighbors’ bedroom window. The dog barks, the motion sensor trips, and their bedroom allegedly lights up like a stadium — blackout curtains and all.

“It’s been a month, they wake up pretty often,” OP writes. “If I’m awake, you’re awake too.”

Commenters are calling it “genius,” “brilliant,” and the rare case of “petty revenge” that feels completely earned, especially since OP repeatedly tried the “mature route” first.

The terms of surrender are simple: train the dog, and the lights go off.

Until then, one backyard remains quiet, one German shepherd keeps barking, and one bedroom window is living in constant fear of the next blinding 3 a.m. wake-up call.