Smart Security
Night Vision Technology: IR, Starlight, and Thermal
Most security incidents happen at night. A camera that cannot see in the dark is a camera that is useless half the time. Understanding night vision technologies is essential to choosing cameras that actually protect your property.
Infrared (IR) night vision
IR is the most common night vision technology. The camera has IR LEDs that illuminate the scene with infrared light, which is invisible to the human eye but visible to the camera sensor.
How it works: When light levels drop below a threshold, the camera switches to IR mode. The image becomes black and white. IR range is typically 20-40m for standard cameras, up to 50m for long-range models.
Pros: - Standard on most outdoor cameras - No additional cost - Works in total darkness - Reliable and well-understood
Cons: - Black and white only - IR range is limited - IR illumination can attract insects (which trigger motion detection) - Reflective surfaces (license plates) can be washed out by IR
Best for: General outdoor surveillance, parking lots, building perimeters
Starlight / ColorVu technology
Starlight cameras use very sensitive image sensors and large apertures to capture full-color video in extremely low light — down to 0.001 lux or lower.
How it works: Instead of switching to IR, the camera keeps the sensor in color mode and amplifies available light (streetlights, moonlight, building lights).
Pros: - Full color at night — critical for identifying vehicle color, clothing color - More detail than IR in low light - No IR reflection issues - More natural-looking footage
Cons: - Requires some ambient light (does not work in total darkness) - More expensive than standard IR cameras - May still switch to IR in very dark conditions
Best for: Areas with some ambient lighting where color identification matters — entrances, parking areas, retail
Thermal imaging
Thermal cameras detect heat signatures rather than visible light. They produce an image based on temperature differences.
How it works: A thermal sensor detects infrared radiation emitted by objects. People and vehicles appear as bright shapes against cooler backgrounds.
Pros: - Works in total darkness - Works through smoke, dust, and light fog - Detects people and vehicles at very long ranges (hundreds of meters) - Not affected by lighting conditions - Very low false alarm rate for analytics
Cons: - Expensive - Lower resolution (cannot identify faces or read plates) - Does not show visual detail (color, clothing)
Best for: Large perimeters, remote areas, critical infrastructure, detection (not identification)
Choosing the right technology
| Need | Recommended Technology |
|---|---|
| General surveillance | IR |
| Vehicle/license plate identification at night | Starlight + IR supplement |
| Perimeter detection at distance | Thermal |
| Retail entrances | Starlight |
| Total darkness, no ambient light | IR or Thermal |
Hybrid cameras
Some cameras combine starlight sensors with supplemental IR. In low light, they use starlight mode for color. In total darkness, they switch to IR. This gives the best of both worlds for most applications.
Next steps
If you need night-time surveillance, request a site assessment. We evaluate lighting conditions at your property and recommend the right night vision technology for each camera position.