Low light has been one of panoramic cameras' biggest challenges, with most essentially useless in low light, becoming a key barrier for panoramic adoption.
For instance, here's one comparison from our original panoramic shootout:
As can be seen, performance ranged from really bad to terrible.
Hikvision claims to change this with two new panoramics that have built-in IR illuminators. We bought both the 3MP (DS-2CD6332FWD-I [link no longer available]) and 6MP DS-2CD6362F-I) versions, and tested them against leading panoramic cameras from Axis, Brickcom, Samsung, and Vivotek to see how they compared in low light, WDR and even light scenes.