More light for your money! High Pressure Sodium Lamps operate by igniting sodium, mercury and xenon gases within a sealed ceramic arc tube. They emit light energy in the yellow-red-orange regions of the spectrum; the red spectrum stimulates flowering and fruit production.
Many indoor gardeners switch to HPS lamps when it is time to induce flowering or fruiting of their plants. One year warranty.
250 Watt – 28,500 initial lumens
400 Watt – 50,000 initial lumens
600 Watt – 90,000 initial lumens
1000 Watt – 140,000 initial lumens