Low Pressure Sodium Lamps

Common uses and advantages

Low pressure sodium lamps are used in outdoor lighting of some parking areas and bridge underpasses. The very yellow color does not attract insects but it distorts colors.

While these lamps are highly energy-efficient they are rarely used because all objects under their light appear to be yellow or yellow-gray.

Other options to consider

If energy-efficiency is the overriding concern, low pressure sodium lamps are the best choice. A change away from low pressure sodium would be made for other reasons, such as a desire for better color.

The only strategies to improve the energy efficiency of a low pressure sodium system is to avoid overlighting and limit the hours of use to essential times.

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