Panoramic cameras typically have significant problems with low light.
The combination of high f numbers (f/2.0 or worse is common) and very high resolutions (5MP common) makes this almost inevitable.
From our panoramic shootout, here are samples under 1 lux at just 6 feet away from the camera:
Obviously, pretty bad.
One obvious solution is to integrate IR inside the panoramic camera.
I want to make a list of manufacturers who support this.
Hikvision does, see Hikvision IR Panoramic Camera Tested.
I see Vivotek is coming out with an IR Panoramic (FE8181).
What else is out there?
Manufacturers feel free to add your own integrated IR panoramics with a link to a product page.