It may be worth clarifying what is meant as a 'basking' bulb. When diurnal reptiles bask, they need not just UVB and not just heat, but both on one spot. I am assuming your reference here in this thread is referring to a 'basking bulb' as the source of heat for daytime? Out of curiosity, why do you prefer Fluoro tubes over an MVB? It may be something as simple as a matter of personal preference, but I prefer the MVBs for my diurnal reptiles.