I can see that this post is aged.. but I'm going for it anyway...
fwiw....
I'm new to the cam/surveillance world and still def. learning...
I have a 1 cam setup right now (gonna add 2 more).
I'm using the XX36A cam for the moment, but I am more than happy with the pic quality.
It's an IR cam and it kicks butt before the lights come on in our courtyard.
There's a dark area under the stairs, that it brings to light !! so to speak.
and there is def. some distance to that particular spot.
(I tried to insert a pic but, I 'spose inserting pics is locked out)
The XX36A normally is $129 (wide-eye $139) but they do put them down to 1/2 at times.
I'm very pleased with the cam but, there's more I want to do.... Diff. topic tho...
Might be the cam series that you're looking for...
They claim down to .5 lux ... I have absolutely no reason to doubt that performance level !
Take care and good luck !