I'm not sure what the question is, but I'll try an answer anyway.

For large format, they provide lots of cool light. Fairly even. The new Aristo tube works well with the vc papers when using filters. They are small and light weight. They are diffuse, making for a nice low contrast light source. No Callier effect and dirt and scratches are reduced. On the bad side, the light output drifts with temperature and the 'thermo' doesn't work well enough to compensate. You will need a closed loop timer like a Metrolux. The two tube versions for vc printing don't put out enough light and exposures are excessive.

I use mine for 6x6 up to 8x10. It is a little slow for 6x6, but for everything else it is very good. For 8x10, very fast.