The Sylvania Grolux HPS bulb was designed specifically for greenhouse supplementary lighting. It has increased blue light and the highest PAR rating. This is the hottest bulb right now and is consistently out-performing the Hortilux. The Sylvania Grolux Features:
Extreme high light output
Improved quality of light : increased red and blue light output
10% higher photosynthesis flux when compared to standard HPS 'super' bulbs
