Hello everyone!

I`m in a process of changing my lighting system. I have a question:

What is the best:

1 48 inches fixture with two tubes

- 2 tube 40 watts Sylvania DayLight ( cool white ) OR
- 2 tube 40 watts Sylvania warm light ( Grow-Lux )

OR
- 1 tube of each

Is two tube of 40 watts too much? I also saw some 24 inches fixture with 20
watts tube?

What is the best knowing I`m growing mostly Phal, Paph and Onc.

Thanks

Claude