Alright, now I'm pissed. I was perfectly happy with cheap, semi-crappy cameras off of Amazon. Then I found this forum. Then I found the Dahua threads. Then I found the 5231 thread. Then I ordered and installed one, great service from Andy. Now I'm going to be spending some money to upgrade all my cameras to 5231s, and add a few more in the process. This is costing me money!
The one I have looks at our back door and catches the driveway gate. When we turn on the floodlight, a single 50 watt LED, it switches back to color, daytime, mode. In night mode it "sees" all the way to the street, say 150 feet away, but I do have an 11 watt IR illuminator pointed to "wash" the driveway. Add in the great resolution and zoom, that actually works well, and these things are really great for the money. What's aggravating is I have to wait until the middle of January before I order more. Ratza kravitz fammus.