I didn't see these new 4MP low light "Powered by Darkfighter" cameras mentioned anywhere- apologies if they have been.
Varifocal version DS-2CD2H45FWD-IZS :
Min. Illumination: Color: 0.008 lux @(F1.2, AGC ON), 0.011 lux @(F1.4, AGC ON), 0 lux with IR
1/2.5" Progressive Scan CMOS
2.8 to 12 mm...