Choose from a wide variety of 400 Watt High Pressure Sodium lamps. All HPS bulbs are the highest quality from top manufacturers including Philips, Sylvania, Grolux, GE, Sunmaster & Eye Hortilux.
400 Watt High Pressure Sodium bulbs produce a red/orange spectrum that promotes fruiting, flowering and budding and will speed up and increase plant growth during the fruiting and flowering stage. HPS lamps should be used as secondary or supplemental lighting (used in conjunction with natural sunlight.)
Special enhanced 400 watt HPS light bulbs, such as the Son Agro 430W HPS or Sylvania GroLux provide all the benefits of standard HPS plus up to 30% more energy in the blue spectrum. The Sylvania 400W GROLUX bulb is the only bulb designed specifically for growing plants. The GroLux HPS bulb from Sylvania has the highest PAR rating of any bulb on the market. The GroLux bulb also has 30% more blue spectrum than a standard HPS bulb. The Grolux is the best enhanced 400 Watt HPS bulb available in the U.S. at the most economical price.
The Eye Hortilux Bulb provides all the benefits of standard HPS plus 25% more energy in Violet, Blue and Green spectrum than standard High Pressure Sodium bulbs.
Save when you by a complete HPS grow light system that includes everything you need.
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400 & 430 Watt High Pressure Sodium (HPS) Lamps
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