Its also relatively easy to select multiple brightness levels when you run a tube way below rated power (with filament heating to compensate), this is semi-easy to do using large tubes, which makes the whole setup even cheaper. And since you can in such a setup start tubes at reduced brightness, low cost magnetic ballasts are more ok.
To be honest, brightness is one of the biggest deals, and needs to be right. Suggest a little experimenting to make sure you get close. You can use filament bulbs and translate the power required using the different efficacy values for filament vs tube.
NT