High Pressure Sodium lamps and ballasts are often used in applications such as roadway, parking areas, street lighting, etc. These systems are characterized by a yellow light, long life, and are suitable for both indoor and outdoor applications. HID lamps will perform equally well and maintain light output in both cold and warm applications. STANDARD high pressure sodium ballasts are individually packaged, contain universal mounting brackets, and are prewired to the capacitor or ignitor when needed.