I've been looking at the Dahua you mentioned and I see that the minimum illumination is 0.0005 lux@F1.2 (B/W). I saw the demo video for night mode and it seems pretty decent for the price range. My only concern is there was a fair bit of light pollution in the video and I'm curious how this performs in a residential area where there isn't quite so much light pollution from offices and street lamps and so on. According to Wikipedia 0.002 lux is a moonless night with airglow but a full moon is .27lux on the low end. Does anyone have experience with this to know how it will perform? If needed I may have to suggest the installation of a flood light to make up for the lack of IR. I understand IR would up the cost of cameras but the extra cost seems high to me and makes them outside the budget window.
By the way, I really liked the iSpyConnect. The program is well put together and is easy enough to use if your camera is already supported. I had a Vivotek PTZ camera that wasn't supported but it only took me about 15 minutes to make a new XML file to support it. My only issue was that the video feed was choppy and even though it was running at 25 fps it looked more like 10 fps. The CPU usage was high but not too terrible so I think the software was to blame, not the hardware.
Edit: Nevermind, unless it's a typo I see that they list the min. illumination at 0.0005 not 0.005 so it's a big difference, I must have read it too fast. I'll have to hope it works.