Eye Hortilux Double-Ended (DE) High Pressure Sodium grow lamps offer a reliable light source capable of producing consistent high yields through many growth cycles. Consistent high yields save you money and stress! The exclusive Eye Hortilux DE spectrum provides 1,950 µmol of photosynthetic photon flux (PPF) when operated at 1000 W and 2,100 µmol when operated at 1150 W. PPF µmol are measured between 400 and 700 nanometers. Do not handle with bare hands. If you need assistance in determining if this bulb is right for your set up give us a call and we will be happy to assist you!