One Light Left On AI prompt example for Short Film

WHAT IT CREATESShort Film

A contained suspense short in a dark apartment tower where one illuminated window appears to move floor by floor as the protagonist climbs.

BEST FORCreative production

Client concepts, visual exploration and AI-assisted production workflows.

CUSTOMIZEMake it yours

Change subject, environment, lighting, palette, composition and model-specific controls.

VIDEO · Veo 3.1 · Runway Gen-4.5 · Kling 3.0 · Luma Ray3.2

One Light Left On

A contained suspense short in a dark apartment tower where one illuminated window appears to move floor by floor as the protagonist climbs.

CinematicShort Film5 Variations15 views0 copies

Duration60–90 seconds

Aspect Ratio2.00:1

CameraSlow tracking, stairwell follow shots, locked corridor frames

ShotSymmetrical wides, flashlight close-ups, floor-number inserts

LightingFlashlight beams, battery emergency lights, one warm practical source

StyleGrounded architectural thriller, deep blacks, realistic low-light exposure

MAIN PROMPT

Create a contained cinematic suspense short film titled "One Light Left On." Set the story inside a residential tower during a citywide power outage. From outside, the protagonist notices a single warm-lit window high above, even though the building should have no electricity. As they climb the emergency stairwell to check on an elderly relative, that light appears to move one floor higher each time they look through the stairwell windows. Build suspense using architecture, repetition, practical flashlights, emergency signage, breath, footsteps, and changing floor numbers. Avoid visible monsters or supernatural effects. Keep the building layout coherent and the performance grounded. Use wide symmetrical corridor shots, tight flashlight-lit close-ups, slow stairwell tracking, and deep shadows with realistic exposure. End with the protagonist reaching the relative’s apartment and discovering the moving light had a human explanation that is still unsettling rather than comforting.

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Video compatibility: Adjust duration, motion strength and audio controls to your selected generation model.

Prompt Variations

5 professionally rewritten directions around the same core idea.

The Light Moves Down

Reverse the pattern: the protagonist climbs upward while the warm light seems to descend toward them one floor at a time. Use floor-number inserts, repeating landings, natural flashlight behavior, and a final human explanation that remains unsettling.

Seen Only From Outside

Alternate interior stairwell footage with exterior telephoto views of the tower. The audience can see the light moving while the protagonist inside cannot. Keep geography consistent and end with both perspectives converging on the same floor.

Emergency Generator

Introduce an old emergency generator that briefly powers one floor at a time in an irregular sequence. The protagonist assumes the moving light is electrical, but details suggest someone is intentionally triggering the system. Use mechanical sound and practical utility-room lighting.

The Relative Is Not Home

Have the protagonist reach the elderly relative’s apartment only to find it empty. The warm light then appears in the unit across the hall. Use quiet room-tone suspense, locked compositions, flashlight reflections, and a final human clue.

Single-Take Stairwell

Create the short as one continuous-feeling stairwell take. The protagonist climbs several floors during the blackout while the warm light changes position through landing windows. Use hidden transitions only when necessary and maintain consistent floor signage and physical fatigue.