The Nanolux Complete DE 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. There is no stray light falling up to 5' to each side of the tray as would be the case with the commercial DE fixture. The DEFNC 4×4 comes with a NCCS compatible, 120/240V fan style DE high frequency ballast. FEATURES NCCS ready smart ballast technology Random Start Technology Soft Start Technology Soft Dim Technology 6 phase dimming (600-1200W) Slow Start, open circuit and low voltage protection Compatible with other industry DE Bulbs Fan Style Ballast 3 Year Warranty Specifications Input Voltage: 120-240V Output: 600-1200 (6 settings) Input Frequency 50/60Hz Operational Frequency›85kHz THD ‹10% Power Factor: ›0.94 CF‹1.7 Ta = 86F Tc = 149F