Happy Thanksgiving Miles!
Thank you for bringing up UVB. Fortunately, I am not using UVB with her. I was worried about some of the issues that you mentioned, considering that she is leucistic.
I read about the potency of the bulbs being off, but I did not know that the distance they recommend is too close--that's good to know. I sometimes bring her out to the backyard during sunset in the summer so she can at least get some natural sunlight at some points in her life.
On the same note, I also thought it could be from the light bulb in her home. I bought a dimmable full-spectrum LED from Amazon some time ago, it wasn't a cheap product, but neither was it a recognizable brand, so who knows what it is emitting. I'll switch it back to the Phillips daylight bulb I had before.