High-pressure sodium: an alternative to low-pressure sodium for roadway lighting
The energy-saving advantages of high-pressure sodium (HPS) systems for roadway lighting are discussed in the context of the popularity of low-pressure (LPS) in Europe and its specification for major lighting and relighting projects in the U.S. A comparison of LPS and HPS lamps notes the larger lamp size and the diminishing lumens per watt of LPS lamps with time and their lower coefficient of utilization. HPS lamps are compact, with more efficiency, better color rendition, and a good maintenance of light output. More useful light actually falls on the roadway with the HPS lamps. Europe, which adopted LPS lamps after World War II, is the major manufacturer of lamps and luminaire types, although manufacturers are also producing and recommending the HPS lamps.
- Research Organization:
- Product Information, Hendersonville, NC
- OSTI ID:
- 6519110
- Journal Information:
- Electr. Forum; (United States), Vol. 4:4
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
LIGHTING SYSTEMS
COMPARATIVE EVALUATIONS
ROADS
SODIUM
BRIGHTNESS
COLOR
EFFICIENCY
ENERGY CONSERVATION
EUROPE
LIGHT BULBS
PERFORMANCE
ALKALI METALS
ELECTRICAL EQUIPMENT
ELEMENTS
EQUIPMENT
METALS
OPTICAL PROPERTIES
ORGANOLEPTIC PROPERTIES
PHYSICAL PROPERTIES
320602* - Energy Conservation
Consumption
& Utilization- Municipalities & Community Systems- Public Services- (1980-)