Hi everyone.
I am needing to order new UVBs for my dragons. Typically I order Reptisun 10.0 T8 tubes from Amazon. Have not had any issues with them so far as I know (I don't have a light meter or anything to really test it).
I see a lot of people suggesting the Arcadia D3 12% tubes. I found this while searching for them. Not much info from this site so, not sure if they are correct or not. Great price if they are, though.
The Arcadia and ReptiSun bulbs are pretty comparable (and high quality). If you get the same size then they should be interchangeable within the same fixture if you wish to use the other brand. The big difference comes when you move from a T8 to a T5 (which would require a new T5 fixture as well). The output and effective distance is greater with a T5. T8 is pretty much the same between brands though.