We have three bunnies in indoor hutches. It is dark in the room. Usually I put them in outdoor cages half the day every day most of the year. For the next two months, it is too hot (90-110) so am having to keep them indoors. Am seeking floor lamps that will hold uva/uvb bulbs but don’t know what dosage they need. I have read that the lamp should be 9-15 inches away and that they need a minimum of 20 min per day. One bunny, Dutchess, had terrible tooth problems until I began giving her daily time outside. The tooth problems disappeared. Recommendations would be really appreciated. Thank you!!