Accession Number DE2013-1087813
Title Demonstration of LED Street Lighting in Kansas City, Mo.
Publication Date Jun 2013
Media Count 64p
Personal Author B. R. Kinzey M. Hadjian M. P. Royer R. Kauffman
Abstract Nine different streetlighting products were installed on various streets in Kansas City, Missouri during February, 2011, to evaluate their performance relative to the incumbent high-pressure sodium (HPS) lighting. The applications investigated included 100 W, 150 W, 250 W, and 400 W HPS installations. Initial measurements and comparisons included power, illuminance, and luminance; sample illuminance readings have continued at each of the nine locations at roughly 1,000-hour operating intervals since then. All of the LED products consumed less power than their HPS counterparts with a mean difference of 39% and a range of 31% to 51% but they also emitted 31% fewer lumens, on average. The net result is just a 15% increase in mean efficacy. Applying the city's stringent light loss factors to the initial measured data meant that five of the LED products (and two of the HPS luminaires) were predicted to eventually fail to meet the specified mean illuminance over their lifetimes; however, the specified light loss levels are not expected to be reached by the LED products until some distant future date (between 12 and 30 years after installation according to manufacturer specification sheet estimates). The practical value of designing streetlighting systems to meet illumination requirements more than 15 years in the future is questioned. Numerous sources of variation in field measurements are noted throughout the report, particularly seasonal influences such as ambient temperature and foliage that are evident in the time-series illuminance data.
Keywords Ambient temperature
Energy consumption
Illuminance
Kansas City(Missouri)
Light emitting diodes
Lighting systems
Luminance
Measurement
Performance evaluation
Seasonal variations
Streets


 
Source Agency Technical Information Center Oak Ridge Tennessee
NTIS Subject Category 49E - Optoelectronic Devices & Systems
50A - Highway Engineering
89B - Architectural Design & Environmental Engineering
97B - Energy Use, Supply, & Demand
Corporate Author Pacific Northwest National Lab., Richland, WA.
Document Type Technical report
Title Note N/A
NTIS Issue Number 1403
Contract Number DE-AC05-76RL01830

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