As I said it seems a waste to provide what seems unecessary.
My understanding is that if temperature is sufficient and food items contain sufficient vitamin D, such as when feeding whole food items, then UV is not required. I have no proof but believe through observation it is not necessary. I sucessfully keep and breed BHPs in a snake room with no sunlight ( only artifical light) and have done for some years. I know of many other breeders, some who have been breeding BHPs for 35 years, and who do not give there BHPs access to either natural or artifical UV, using only heatmats for heat, and there seems to be no detrimental effects.
I have read suggestions that UV can enhance colour in pythons but have seen no evidence.
Many things occur naturally where BHP's live, and they may have the option of exposing themselves to those things, but it does not necessarily follow that those things are necessary for healthy life.eg dingos. I believe that BHPs go out in daylight hour in search of food or heat not UV.