Low-pressure sodium lamps provide the most energy-efficient outdoor lighting compared to Metal Halides or High Pressure Sodium lamps, but they have very poor color rendition. Typical applications include highway and security lighting, where color isn't important.

Like high-intensity discharge lighting, low-pressure sodium lamps require up to ten minutes to start and have to cool before they can restart. Therefore, they are most suitable for applications where they stay on for hours at a time. They are not suitable for use with motion detectors.

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