The energy-efficient luminaires are provided as a seamless upgrade solution for the Canadian market, where 347-volt supply circuits are commonplace in commercial and industrial settings. Vapor Tight and Utility Wrap fixtures are designed to replace traditional fluorescent lighting with more than 50% energy savings and a significantly longer, 50,000-hour lifetime that minimizes maintenance interruptions and downtime in business productivity. The 347-volt-compatible models are available as four-foot-long, 30- or 50-watt fixtures in color temperatures of 4000K and 5000K.