Instruction: Generate an answer to the question by utilizing the information contained in the document.

Input:
Question: How good is the night vision/low light?
Document: The MSRP of this device is absolutely shocking. This hidden camera is complete junk that shouldn't be selling for more than $30.The general picture quality is poor, in low light situations it's downright terrible, the field of vision is much too narrow, and the menu system/operation is overly complicated and unintuitive. It's really surprising just how bad the picture quality is. Most smart phones from 2009 take better video.Do not buy.
Video quality is decent in areas with light but is somewhat blurry and hard to see clearly in low light settings. To set it up correctly, you have to use a TV.
It requires an RCA connector for the video which would be typical for the last generation of analog TVs.3. The camera is VERY low resolution and it is NOT very sensitive to light. This means that you need VERY strong lighting of the subject if you actually want to make an identification of the individual. It it is someone you know, you might be able to guess the identity, but other than that, it is useless.
(The users guide says the camera can operate with as little as 2 lumens of light, tho I found at least 50 watts of ligth is required in a room, to get an image.) Even on HIGH QUALITY, a low light image can be grainy, monocromatic, with low resolution. So much depends upon how much light is available where you intend to use the unit.
The good.....This clock/DVR/Nannycam is compact in size so it fits on an end table or bedside table easily. The numbers on the clock are very large and bright - easy to see at night from across a room. The alarm clock feature works well and is loud enough for the average person to use daily. It comes with a 2 gig memory card included and needs no batteries.
easy setup. Very covert and easy to setup. The only draw back is the display is large, so VERY bright at night, no dimming option.
Gives a sharp clear image, but with a range of view so limited that it is difficult to see how it could catch anyone doing anything. It could serve your purpose, but only if you are lucky. The chances of whoever you're hoping to catch doing anything that happens to be perfectly in range of the camera is very low. In the end, it was a waste of money.
Personally, even tho you can set up how much sensitivity the camera has for motion detection, I didnt think motion detection worked as well as I imagined it should. I felt better with setting up the camera to record one or two frames per second, on low or midium resolution, during those specific times i KNEW my room was unoccupied. (and illuminated enough so the Spy Camera could record a usable image.
But if your interest is confined to a small area, this might do the trick.Set up wasn't a problem; we managed to do it without recourse to Live Customer support.Three Stars. The bottom line? If a limited field of vision and a hidden camera are the goals, the Defender Alarm Clock DVR may be the right product, but it's too limited in function for the price.
However as I mention above, then the motion detection was triggered too often by tree movements and light changes, so it is a fine line.Using this camera indoors, you need to be careful you don't end up with a back-lit situation.
Answer: This thing is a piece of crape. It would take studio lighting to get a decent picture that one could recognize a face. I set this up in my living room with all lights on and still could not make out my face. Maybe at high noon with clear skies and standing right in front, maybe. I sent it back, pure junk.