HIGH PRESSURE SODIUM LAMPS - These lamps are red/orange in the spectrum. They are the best lamps available for secondary or supplementary lighting (used in conjunction with natural sunlight). This type of light promotes flowering / budding in plants. It is ideal for Greenhouses / Commercial growing applications.

1000 Watt HPS Standard Lamp is rated at 140,000 lumens

Select from 3 different brands: Osram/Sylvania, Philips or GE