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Subscribe to this list via RSS Blog posts tagged in Day/Night Security Camera

So you’ve contacted a security systems integrator about installing a CCTV system and soon it will be time to put it to use.  Actually, here’s to hoping you never have to use it…let’s hope its preventive aspect is enough to prevent crime, employee theft or whatever you’re trying to achieve before the fact.

Pictured above is an infrared "bullet" security camera

During your meetings, please be sure to broach the subject of low light—accommodating for this is essential in your video surveillance system. It would be a shame to invest thousands of dollars in high tech equipment, only to disregard an important time when cameras are needed—in the absence of abundant light.

When researching security cameras, pay attention to the “Lux” rating number.  The lower the Lux rating number, the better the camera will operate in lower light.

The term Lux actually means lumens (a measure of light) per square meter.  One Lux is the amount of light cast by one candle at one meter’s space.  As an example, full sunshine is about 10,000 Lux, while you only need about 300 Lux to read something.  

This number will be found in day/night cameras that are used in low light.  In the day, color is used.  But since color is ineffective at night, it switches to black & white mode when it gets dark, hence the term “day/night”.  A special imaging chip is used.

The next step down in terms of light level from day/night security cameras is IR – infrared cameras.  These actually make light for the camera to see as opposed to just being able to see with a small amount of light provided. In fact, the Lux rating for IR cameras is 0, when with low light day/night cameras it could be .1 or .4, for example.

So in essence, you’ll not only be covered for low light situations, but also total darkness with the infrared security camera. 

Either way, you’ll be relying on a small amount of light.  With day/night cameras, low Lux rating models will require only the smallest amount of ambient light from a streetlight, for example.  The light that is needed by IR security cameras is produced by light that is not visible to the human eye.  LED (light emitting diodes) are responsible for this illumination.

Again, be sure to include low and no-light contingencies in your plans for your video surveillance system.  While it is true that many crimes occur during the day, there is plenty that goes on when the sun goes down and thieves can take cover.

Thanks for spending some time with us today.

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