The Gavita Pro 1650e LED is a 1650 µmol s-1 fixture with an impressive efficiency of 2.6 µmol s-1 per watt. The Pro 1650e delivers broad coverage with its 8 passively cooled LED bars. It can be used in a top light or multi-layer application. This powerful, full-spectrum light source is intended for full term plant growth from the vegetative stage to the higher light requiring bloom stage. This fixture is built with high-quality 120-277 volt Philips brand drivers. Power cords sold separately to operate at your desired voltage. Dimensions 44.1 in x 44.1 in x 2.1 in. 630 watts.