A Market-Weighted Description of Low-Beam Headlighting Patterns in the U.S. 980317
This study was designed to provide photometric information about current U.S. low-beam headlamps. The sample included 35 low-beam headlamps manufactured for use on the 23 best-selling passenger cars, light trucks, and vans for model year 1997. These 23 vehicles represent 45% of all vehicles sold in the U.S. The lamps were purchased directly from vehicle dealerships, and photometered in 0.5° steps from 45° left to 45° right, and from 5° down to 7° up. The photometric information for each lamp was weighted by 1997 sales figures for the corresponding vehicle. The results are presented both in tabular form for the 25th-percentile, the median (50th-percentile), and the 75th-percentile luminous intensities, as well as in graphical form (for the median luminous intensities, and median illuminance values reaching the road surface). The information is presented in aggregate form, as well as broken down by vehicle type and light source.
Citation: Sivak, M., Flannagan, M., Kojima, S., and Traube, E., "A Market-Weighted Description of Low-Beam Headlighting Patterns in the U.S.," SAE Technical Paper 980317, 1998, https://doi.org/10.4271/980317. Download Citation
Author(s):
Michael Sivak, Michael J. Flannagan, Shinichi Kojima, Eric C. Traube
Affiliated:
The University of Michigan
Pages: 16
Event:
International Congress & Exposition
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
Automotive Lighting Technology-SP-1323, SAE 1998 Transactions - Journal of Passenger Cars-V107-6
Related Topics:
Light trucks
Headlamps
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