EYE HORTILUX Double Ended (DE) High-Pressure Sodium grow lamps offer a reliable light source capable of producing consistently high yields through many growth cycles. The exclusive EYE HORTILUX DE spectrum provides 1950 ?mol of photosynthetic photon flux (PPF) when operated at 1000w and 2100 ?mol when operated at 1150w. PAR ?mol are measured between 400 and 700 nanometers