Massive size for increased coverage area and excellent uniformity. Allows closer placement to plants. Powder-coated galvanized steel body. Highly reflective aluminum interior offers excellent reflectivity and diffusion. Includes unique socket assembly with 15 ft lamp cord that is attached with four wing nuts. Some assembly required. Patent No. D613900 and Patent Pending No: 29/434634. Sold in Increments of 3 only. ETL listed. 5 Year warranty