The Lighthouse offers features normally found on more expensive huts. With 3 sizes available to fit your specific growing needs the Lighthouse will let you grow bigger taller crops throughout the year.All Lighthouse models feature:• .8mm steel poles powder-coated white• Strong plastic molded corners• Premium quality zippers same as used on more expensive units• Duct ports - 5 on smaller tents 6 on 4x8 tent• Roll up rear door with straps to keep the doors open• Duct ports with twin socks no flanges necessary• Waterproof double layered floor• Inner lining is 500 D canvas material with dimpled metallic.... the same as premium unitsExterior Dimensions: 55" x 28" x 78"