OSRAM VIALOX NAV-T 400W High Pressure Sodium Lamp

The OSRAM VIALOX NAV-T (SUPER 4Y) is a high-performance industrial light bulb primarily used for street lighting, outdoor security, and industrial facilities. This specific 400W model belongs to the High-Intensity Discharge (HID) family, specifically the high-pressure sodium (HPS) category, known for its characteristic warm golden-white light and extreme durability.

Originally founded in 1919 in Germany through a merger of the lighting divisions of Auergesellschaft, Siemens & Halske, and AEG, the OSRAM brand has a century-long history of innovation. While historically a German powerhouse, the company's ownership has evolved significantly. In 2020, OSRAM was acquired by the Austrian sensor specialist ams AG, forming ams OSRAM.

As of early 2026, the 'Specialty Lighting' and traditional lamp business, which includes industrial discharge lamps like the VIALOX series, has seen further shifts in ownership. In March 2026, ams OSRAM completed the sale of its Entertainment and Industry Lamps business to the Japanese optical technology leader Ushio Inc. This move was part of a strategic shift to focus more on semiconductor-based photonics, while Ushio took over the manufacturing and intellectual property for these specialized professional light sources.