You got any proof of that?
Show me where someone has actually made the definitive judgement, based on scientific research, that bluetongues do not require UV. Don't just show me opinion from the net.
yes personal experience seeing adults kept inside there whole life that have no problem and breed every year.... one of my mates has a 12 year old that has never been kept under uv. It has more to do with diet rather then uv, just like monitors....