Oh you made me laugh so much!Uh with a T8 5.0, rub the cham against the bulb...
You cant get even 1.0 UVI out of the bulb. I believe its limit is .5 UVI at 6".
T8 5.0 is for "tank" lizards such as geckos and anoles. Things with foot tall cages that have no problem running up the side of the tank and sunning themselves directly under the bulb
PS havent read this thread, just responding to beman request.
Ok what if they went to a 10.0 t8 or is that still no bueno?