That is a neat experiment you linked to, but, a really small sample size (6 female ball pythons tested against UVB)...so small that I might consider it to be non-viable. The control group consisted of males as well: which is odd because males/females should have been divided evenly within the test and control groups...
All the care sheets I saw online recommend UVB for ball python care and stated that studies have proven this to be beneficial. I am looking for those studies.
Some people claim that the color of their ball pythons look 'brighter' in UVB light. I do not consider 'brightness' to be a beneficial characteristic without a physiological component (I look better tan too-doesn't mean it is a good thing). The same goes for behavioral modification: A subjective change in behavior (e.g. 'more active') is not always a beneficial symptom. A ball python that increases roving around its enclosure is not necessarily an indicator that it is 'more comfortable'.