PRO GROW 300 & 500 W UFO LED fixtures now include manual dimming switches and a 0-10 V RJ-14 connection to the PRO GROW Smart Controller. Operate up to 160 x 0-10 V UFOs with sunrise/sunset and simultaneous grow and bloom room capability. PRO GROW UFOs blend top bin Samsung LM301H diodes with both Optimum red (660 nm) and far-red diodes (730 nm). The 730 nm far-red diodes contribute to the Emmerson Effect, offering higher Quantum Yield than red diodes alone. Efficacy is over 2.1 µmols/J, but real-world performance is closer to 2.4 µmols/J with the Emmerson Effect. Diode counts are the highest in the industry, so there is no need to over-drive the equipment to achieve maximum PPF. Comes with a 3-year warranty.