These lamps are enhanced to provide a mainly red spectrum of light which plants need to flower successfully. And because Powerplant are Super High Pressure Sodium, this means the light produced is far more usable to plants than  standard HPS Bulbs.

With  a long life of about 24,000 hours the Powerplant Super HPS range is great value for money - you should easily get 12-18 months of high output, before lumen levels even begin to drop.