I provided UV lighting many years ago to my monitors. Then I quit providing it. Since then I have raised quite a few monitors, including arguses. I have bred salvators, niles, and presently timors (ok, so far just the mating has taken place but eggs should be here soon). Maybe my monitors will all drop dead tomorrow, but until that happens I have no indication that they are in poor health or suffering any ill effects from not having this lighting. My CBB salvators have never seen UV light nor direct sunlight. Mushu was rehabbed with no UV or direct sunlight.
More interesting in my opinion is that my iguanas have not had UV lights in YEARS. In fact, probably over 7 years, and two of those iguanas are approaching 9 years old. Try stating that on the iguana forum and see what happens! The third iguana has not had UV light ever while in my care and probably did not have it in the year or so prior to my care. It was a stunted little iguana when I rescued it. Now it is a 4 foot very ill-mannered male iguana who has not seen UV light (nor prolonged direct sunlight) since AT LEAST August of 1998.
Salvators
-----
^x^ Bloodbat ^x^