680W LED was designed to maximize performance. Several changes were made to further enhance light output. Reliably sourced components including Samsung LED's and Osram deep red LED's create improved performance . The LED model E gently drives LED's to optimize fixture life and improve spectral output. The 8 passively cooled bars provide full spectrum, broad coverage light for full spectrum. The LED 680 is a 1850 umol/s fixture. It can be used in a top light, multi-tiers or commercial grow applications. This powerful, full-spectrum light source is intended for full term plant growth from the vegetative stage to the higher light requiring bloom stage. Highest Efficacy LED Chips Samsung 301H & Osram deep rod diodes provide 2.85 umol/J PPE, LED Model E 680W is a flowering fixture. it can achieve a high average ppfd of 1000 umol/s on your crop. For mixed vegetative / flowering environments and to tune the amount of light to the plants you grow. Dimmable: 270W / 410W / 550W / 680W Is compatible with Prolux controllers. Equipped with an external RJ14 cabler for installation of 160 fixtures per controller port by daisy chaining fixtures. Pro 6 680W LED Specifications Input Power 680W Number of Light Bars 6 Efficacy 2.85 μmol/J PPF 1850 μmol/s Input Voltage Autosensing 100-277V Mounting Height + 6" (15cm) Above Canopy Thermal Management Passive Lifetime 50,000hrs Power Factor +90% Colour Rendering Index 90ra Ambient Temperature -40*C - +40*C Storage Environment -40*C - +85*C / RH 10-95% Components Samsung Osram Fixture Dimensions 43.5"L x 44"W x 2.3"H (111cm x 112cm x 5.8cm) Fixture Weight 27.5Lbs (12.5kg)