This is a paper by Gavita-Holland Re: Plazma Lighting as supplemental lighting in hydroponics.
"Many studies have shown that full continuous spectrum with sunlight qualities is the best spectrum for healthy plant development especially in Hydro Grow systems. For this purpose Gavita manufactures a light emitting plasma (LEP) luminaire with a high CRI of 94, the Gavita pro 300 LEP. Though it is lacking some red spectrum it is the best suitable lamp for continuous vegetative development or high intensity sunlight simulations in climate rooms."