Today's low-pressure sodium lamps give close to 200 lpw, the most energy efficient light source commercially available. This lamp was made for street-lighting use by (U.S.) General Electric around ...

Just over 100 staff will remain at the factory, producing low pressure sodium lamps for the global market. The job losses have been described as a "massive blow" to the local workforce.

Rotating high-pressure sodium lamps provide flowering plants for spring markets Intermittent light system more cost-effective than incandescent illumination Peer-Reviewed Publication ...