Hello,
Are you referring to the Namiba Terra Replux flourescent tube bulb?
Do you have the plastic cover on the light? If so, I have to advise you to remove the plastic cover as it has been reported a few years ago that the cover blocked out 99% of the
UVB light. To my knowledge or Frances' knowledge they have not changed the plastic cover. So, if the plastic cover is still on, please take it off. The UVB emissions are very good with this light.
Just be sure to keep it 8-10 inches away placed directly beside the basking light for eye protection.
Tracie