These HPS lamps contain a discharge tube with a mixture of gases including high-pressure sodium vapor. The specific spectrum of light colors that the lamp will release depends on this mixture. Generally, they are characterized by their warm tonality by giving off orange and reddish colors, indicated for fruiting or flowering processes.

The latest advances in research have made HPS technology for professional horticultural applications more efficient than high-pressure lamps used for other technologies, reaching an efficacy of up to 2.2 µmol/J.