By the SightShield team · · 3 min read
Why night matters most
Most break-ins, thefts and trespass happen after dark, so a camera’s night picture is often more important than its daytime one. There are three main approaches today: infrared (black-and-white), full-colour night vision, and "smart" dual-light cameras that switch between the two.
Infrared (IR) cameras
When light falls, an IR camera switches to black-and-white and turns on infrared LEDs that light the scene with light invisible to people. It works in total darkness and is the most common type.
- Pros: works in complete darkness; does not light up the area visibly; usually lower cost.
- Cons: black-and-white only, so clothing and vehicle colours are lost; reflective surfaces and nearby walls can glare; insects and spider webs near the lens are lit up and trigger motion alerts.
Full-colour night vision cameras
Colour night-vision cameras use a sensitive sensor and a wide-aperture lens (Hikvision’s ColorVu range is a well-known example) to keep a colour picture in very low light. Most add a small warm-white LED that switches on when it is too dark, much like a porch light.
- Pros: colour at night — shirt colour, car colour and other details police and insurers ask about; the visible light also deters intruders.
- Cons: the light may disturb neighbours or bedrooms; in total darkness the range depends on that light; can attract insects.
Smart dual-light (hybrid) cameras
Dual-light cameras use IR normally and switch on white light only when they detect a person or vehicle, recording that moment in colour. You get quiet, unobtrusive nights and colour when it counts. Many brands now offer this, under names such as Smart Hybrid Light.
Side by side
| Infrared | Colour night vision | Smart dual-light | |
|---|---|---|---|
| Picture at night | Black and white | Colour | B&W, colour on detection |
| Visible light | None | Yes, when dark | Only on detection |
| Deterrence | Low | High | High at the right moment |
| Neighbour disturbance | None | Possible | Minimal |
| Best for | Dark perimeters, bedrooms nearby | Gates, driveways, shopfronts, parking | Homes and compounds where both matter |
How to choose
- Main gate and driveway: colour or dual-light, so vehicle and clothing colours are recorded.
- Long boundary walls in dark areas: IR with good range, plus line-crossing alerts.
- Near bedrooms or neighbours’ windows: IR or dual-light set to switch light only on detection.
- Areas already lit by streetlights or yard lights: colour night-vision cameras give excellent results without their own light.
- Warehouse yards and parking: colour or dual-light; good lighting on the site helps every camera.
Lighting is the cheapest upgrade
Whatever camera you choose, a few well-placed LED yard lights at gates and corners improve night footage more than any camera upgrade. They also make the site less attractive to intruders. We look at existing lighting during every site survey.
Book a free site survey →Example: an apartment basement and boundary
A 200-flat complex in Thanisandra compared both types before upgrading. In the basement, where tube lights stay on all night, colour night vision cameras showed vehicle colours, clothing and faces clearly at no extra lighting cost. Along the rear boundary, which has no lighting and faces houses, constant white light would have caused complaints, so infrared cameras with human detection were used, plus two hybrid cameras at the most likely climbing points that switch to white light on detection. The result: colour evidence where it matters most, without lighting up the neighbourhood.
Thermal cameras →Quick answers
Do colour night vision cameras work in total darkness?+
Most switch on a built-in warm light when it is too dark, so they still record colour within the light’s range. Without any light, they cannot see colour.
Why are there lots of false alerts at night on my IR camera?+
Insects and spider webs near the IR LEDs glow brightly and look like movement. Cleaning, moving the camera slightly away from walls, or using human/vehicle detection reduces this.
Will a camera’s white light disturb my neighbours?+
It can. Use IR or a dual-light camera that only switches its light on when it detects a person, and angle the camera away from neighbouring windows.
Is colour night vision always better than infrared?+
Not always. It needs some ambient light or a white light. In completely dark areas where light would disturb neighbours, infrared or hybrid cameras work better.
Do colour cameras use more storage?+
Slightly, at night, because colour images carry more detail. Plan storage with a little extra margin.