The VT4 Series is an energy efficient industrial Vaportite fixture that features rugged and durable construction. The VT4 incorporates a full metal tray inside a reinforced fiberglass housing with a high impact diffuser. This Vaportite series is suitable for interior and exterior applications and can be chain or cable mounted. The VT4 Series has been designed for maximum operation in commercial institutional and industrial environments where weathering, high temperature, humidity and dust or corrosive fumes are present. Certain airborne contaminants can diminish the integrity of acrylic components. Refer to the Material Compatibility tables for additional information.