I think more light probably would be better for that Ventrata but I have zero experience growing plants in conditions even remotely like Tucson.
Where I live, between NYC & Boston, even low-light plants appreciate full southern exposure mid-winter. By early March, however, the southern windows are getting too intense for some plants, but not Neps if I remember correctly from back when I had Neps. It all works out, though, because the more sensitive plants start moving away from the brightest windows at the same time I want to start putting vegetable seedlings in windows. Eventually, everything goes outside for the warmer months, which probably isn't a successful strategy for Neps in Tucson..