The tube uvb lamps need to 12/18 inches high . But other than that your enclosure looks good . How are you keeping night temperatures up . Do you have a che or is the room temperatures ok ? I don't keep Russian torts so don't know there required temperatures.
It kind of worries me as well... Do you think it will be okay? Or should I try and get it further away? It's only for that little area on the second floor.