Shoot night scenes in daylight with heavy ND filters and reduced exposure — artificial but controlled. Faster than waiting for actual darkness, though it reads as stagey on camera.
Shooting night scenes in daylight sounds counterintuitive — but it only works if you drastically lower the exposure and set the light precisely. You work with strong ND filters (Neutral Density), typically ND 3.0 to 4.8, to reduce the amount of daylight by several f-stops. The chip is then significantly underexposed; what remains are dark, low-contrast images that are reassembled in the edit and color correction. Additionally, artificial light — HMIs, LEDs, or Tungsten — is needed to keep faces legible and structure the scene. The artificial light becomes the main light source; the dimmed daylight becomes the environment.
The practical advantages are considerable: you save electricity (no miles of power cables to illuminate entire city blocks), shoots are faster (daylight is free and uniform), and you have full control over the light direction — quite unlike real night shoots, where you have to set everything up yourself. The crew also works more safely when they can still see where they are walking. However: the resulting image aesthetic is significantly more artificial. Night scenes often appear flat, overexposed, or unnaturally contrasty because real night has a completely different light characteristic — warmer tones, deeper shadows, less sharp transitions.
In everyday set work, this is usually combined: windows in the background are darkened with blackout curtains to prevent daylight from shining through. The camera settings are adjusted to ISO 800–3200 (depending on camera sensitivity), shutter to 1/50 or 1/100, and the aperture is stopped down between 2.8 and 5.6 — enough depth of field, but not so much that you capture too much ambient light. HMI work lights set the key surfaces; bounce boards catch light. The monitor then shows a dark, contoured image that appears artificial on set but becomes believable in the edit with gamma boost and color correction.
Night-for-night (real night shooting) is the more demanding option — but costs a massive amount of money and time. The hybrid solution of day-for-night shooting is therefore standard in low- to mid-budget productions: you accept the artificial look as a conscious aesthetic and incorporate it into the visual design instead of hiding it.