Fretting about getting dark video images at night won't get you anywhere. What you need is an IR camera. With its 50' IR range, the DVTech DVT-P-IR-321-P bullet camera is just what the doctor ordered. This level of night vision is on top of its excellent image quality produced by a 1/3" Sony Super HAD CCD sensor.
Super HAD CCD
Sony's Super HAD CCD technology reduces smear and noise associated with bright points of light in an otherwise dark image, resulting in better image quality at night.