To be honest I've never paid much attention to humidity. As long as you supply a large waterbowl the natural evaporation seems to take care of it.
Too much humidity causes problems and the substrate needs to remain dry.
Lighting is important. They are diurnal and light of sorts is required to mimic photoperiod. Again, I don't worry about it too much as my flat is well lit by velux windows so I don't implement the use of UV and simply stick to energy saving lightbulbs in my set ups.
If you keep them in a particularily dark room without a lot of natural light you should consider providing it.

EDIT - do not use UV with albinos, it can be detrimental to their eyesight.