Lorex Security Camera

I just bought a similar camera. It's black and white only with 8 IR leds. It's small and the IR LEDs are pretty much useless. It works a whole lot better than the X10 color cams but you get what you pay for. If you decide to get on please post a link so we all can view the quality. You can preview it here.
LUX is a measure of the intensity of light. It is based on the age-old measure called the 'candle'. One LUX is equal to one meter-candle.
Sort of depends what you want to monitor with the camera. Is a "body" there: yes/no; or do you want the face to be accurately recognized.