I remember some time ago, that an American made 'Ice fishing' tent being mentioned by members either on here or Photrio. It was said that they used it as it was light tight and MUCH cheaper than the Nova one. they are sold on ebay and were a red colour on the outside at least.
That's all I can remember I'm afraid.
Terry S
P.S. The following is what I believe was what was being talked about
:
https://www.ebay.co.uk/itm/194397601...UAAOSwZj9hUrXY
It would be worth checking with the seller / manufacturer, to check it's light-fastness before purchase though, if intended to be used in a sunlight lit room with no blackening out of the light.