Plant grow bulbs transmit some UVA but VERY little UVB (which is what we need here).
A lizard "thriving" for a couple of years is no indication that all it's requirements are met. I had a reptile manager tell me once that Iguana's didn't need UV because a friend of his kept one for 8 YEARS before it died with D3 supplementation alone! But aren't they supposed live 20 years or more!!
"Do not conform any longer to the pattern of this world, but be transformed by the renewing of your mind."