Lithonia Lighting F150SL 120 M6 1 Lamp 150W High Pressure Sodium Flood Light, Bronze High-pressure sodium is an energy-efficient source and produces a yellow light, which works well in outdoor applications Aluminum construction in gloss bronze Uses 1 150-Watt HID - high-pressure sodium bulb; included 120-Volt HID - high-pressure sodium magnetic ballast UL-listed for wet locations