Can this sensor detect motions when it is totally dark, no lights? Thanks.
1536053
Yes, but it requires a system to work, it does not work by itself. Here is a discount link http://fbuy.me/_1nu. Additionally this the first version of the motion sensor, the newer systems have a different sensor that only runs on batteries, this can run on batteries or be powered via a USB plug.
62685
No, it works in darkness when there is motion, even limited motion; you'll love it!
2252621
This only works for motion sensing--that is, it will only come on if it senses motion, not when it gets dark.
2048015
Yes, our experience with the light (before it completely stopped working), was that it was always on in the dark, albeit at reduced illumination. Once the motion sensor was activated, the light would temporarily get quite a bit brighter.
1059316
Yes. If you turn the light off manually it will not immediately respond to motion to turn it back on, but after a minute or so it will resume the motion sensor function.
1494216
It has a light sensor that requires it to be relatively dark before it will light up when a motion is detected. Mine will not light up in broad daylight, but I am not sure how dark it needs to be to light up . Hope this helps.
2007415
No, it does not have a light sensor. You have physically turn it on and off.
1687851
Yes and no. You can set the SmartGuard to not light up during the day when the sensor detects movement but the camera will still record. I'm not sure if you can set the SmartGuard to only record at night without the light, which doesn't seem practical since there might not be enough light for the camera to capture a picture without the light at night.
2128452
Yes, when motion turns it on. When at rest, it is dim. They work very well.
2221523
I believe you'd have to ask the inventors of motion detectors 'how' these smart little instruments work internally. Here's what I know: when the sensor is set to'on'; in a dark room, any motion (shadow?) in its path, will trigger the light to go on!
2235862
Ours only come on when motion is detected and it is dark. They do not come on when it is daylight. This must be the default because we did not change any "setting".
1360824
It has a adjustable setting for after sunset where you can choose home many hours, but no light sensor. You must rely on the zip set function which, contrary to some reviews, was very simple to setup.
1494214
Only comes on when there is motion, yes at dark. It stays on for 20 seconds. Very bright.
790441
First, ensure that the room in which you placed it is dark. Second, check the sensor switch's setting.
1223572
It's continuously on from dusk till dawn. No motion sensor. Very bright light. I actually bought 4 units of these to light up various locations in my backyard.
331818
I have one and I'm pretty sure it is just a light sensor. without messing around with the electronics it only lights up if it is dark.
831934
The answer is yes. Think of this just like a light at the end of your 3 way circuit. If the light would turn on then the sensor would also be engaged. The light (down stream) from the sensor will be on as needed when the sensor detects motion and no daylight.