You have some real misinformation here
it is D3 that is needed and this is vital especially when young.
As will aspects of captive animal care we MUST take our advice from the wild, we supply an external source of energy that re-creates thes evolved needs in a safe and measurable way.
There are NO issues with using quality UV systems when fitted correctly and for the right period of time.
X millions of years of wild development have allowed every species to thrive, as an ectothermic species that rely on the sun directly and indirectly.
The choice of lamp is totally down to the enclosure size, so what is the size of it?
This explains more
https://vimeo.com/132929989
John