It looks like the 3MP bullet is really similar to the 2MP you tested, and they are close in price.
The IR LED's are much less intense and are smaller, which makes no sense to me. The 3MP dome has the bigger LED's similar to the mini-bullet.
So far I haven't noticed any halo effect, at least not like you had on that 1.3MP dome you tested, that was really acute.
I just grabbed these two shots inside, with almost no light. There is a clear halo effect on the dome but I just realized I left out that black foam ring accidentally, so I took 2nd and 3rd shot with ring in place, with and without the dome.
Apparently the ring didn't make any difference, with the dome installed there is a clear halo at night time.
Is there anything that can be done? is this something that occurs with other dome cameras? I am going to ask Dahua tech support today and see what they have to say.
I'm going to get a little more scientific about this today, I am mounting each camera to a block of wood so I can secure them in similar positions either outside or inside.
Is there a way to add higher quality images (more than 250kb) on this site? Or is that a good reason to have a review site where you have more control (like your site, which is excellent)? I was toying with the idea of setting up wordpress on my LAMP server at home, using a free DDNS name and hosting it myself. I shouldn't have any problem with bandwidth or server resources.