LE SUPER HPS BULB 1000W ET25LightEnerG(TM) Super High Pressure Sodium Flowering Lamps are designed to outperform standard HPS lamps. They have a light spectrum shifted towards the red making them ideal during the flowering stage of growth with added blue spectrum for vegetative growth efficiency. Light EnerG(TM) Super HPS lamps provide more energy which is essential for optimized photosynthetic response. Lamps can be used in both the horizontal and vertical position with the appropriate HPS ballast.