Bob says most reptiles need UVA as much as UVB. He said that with their own specie's Unique vision, adequate UVA allows them to see well, even if there are good amounts of UVB present. UVB emitters usually emit UVA in some amount from large to small. He said UVA allows them to see colors and makes their lives more interesting.
So, I had taken my early advice directly, and provided a CHE and a good thermostat. Now I know better. They also need UVA to boost the richness of their lives. I have found that my unspecified A-lizard is now living in perpetual twilight.
Bob suggested I obtain a T5 type fluorescent UVB tube and fixture. Apparently they emit high levels of both UVA and UVB. I already knew that the t-5's are much brighter than the T-12's
Bob told me that overexposure to intense UVA causes deeper sunburns than do the UVB's, because it's a longer wavelength. Positioning the T5 at the optimal distance for UVB according to my meter is also OK for UVA.
He said I could use two special lamps at the same time. One is the 70 watt mini megaray (for UVB), and the other is a metal halide lamp (for UVA. I'm taking this route.
I hope this post is edifying to at least some people.