Help me choose a light for Dr40

Hello,

Just wanted a opinion on somethings.

I currently have a dr40 for vegin with a growpanel 45

I wanta make a flowering room. Now 1 are the plasma/induction lamps suitale in a dr40 like this one: http://hydroponicshut.com/50-watt-plasma-induction-grow-lamp.html

2 where is the best prices on these lamp?

3 what would be best 1 plasma or multiple cfls?

Thanks in advanced