Where have you found the research on the UVB?

I had previously thought that UVB wasn't necessary but in the last year ran across a few folks who have been using UVB with success. I personally just D3 every feeder that I throw in but I did notice more activity out of my Sav when I put a UVB in for several weeks. This is all anecdotal though of course.

I apologize for my lack of clarity in previous posts. I only meant that if the OP makes the changes I originally recommended that his Sav will be o-k until he completes his wooden build and of course sooner is better then later.