DE 4x4 FIXTUREDO NOT USE DE COMMERICAL REFLECTORS OVER SMALLER GROWS.We at Nanolux have found that there is a large unfortunate misuse of commercial DE fixtures in smaller horticultural grows. Consumers have to realize that one of the largest features of commercial open DE fixtures is their large light footprint allowing for "commercial overlap". The light spread on a commercial DE fixture is about 13' wide which is not practical if you are growing over a 4' x4' tray. The DEFNC 4x4 fixture is designed to produce vertical light penetration over a 4' x 4' tray. The reflector is designed to have ALL of the available light fall onto a 4' x 4' grid at a 24" install height over the canopy top. There is no stray light falling up to 5' to each side of the tray as would be the case with our commercial DE fixture. This has been the reason that we have NOT offered our commercial DE fixtures in 120V. The DEFNC 4x4 comes with a NCCS compatible, 120/240V fan style DE high frequency ballast.NCCS ready smart ballast technologyRandom Start TechnologySoft Start TechnologySoft Dim Technology6 phase dimming (600-1200W)Slow Start, open circuit and low voltage protectionCompatible with other industry DE BulbsFan Style Ballast3 Year WarrantyInput Voltage: 120-240VOutput: 600-1200 (6 settings)Input Frequency: 50/60HzOperational Frequency: 85kHzTHD: 0.94CF 1.7Ta = 86FTc = 149F