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The Journal of the Illuminating Engineering Society of North America Volume 1 Number 1 july 2004

TUNING THE FLUORESCENT SPECTRUM FOR THE TRICHROMATIC VISUAL RESPONSE: A PILOT STUDY

K.W. HOUSER, D.K. TILLER, X. HU

Rooms illuminated by lamps having a higher percentage of their spectral power in the 450-530-610 nm regions were perceived as brighter and more colorful in side-by-side comparisons.

DESIGN PROBLEMS ASSOCIATED WITH AISLE LIGHTING

G.R. STEFFY

Renovation of an historic auditorium posed aisle lighting problems of illuminance criteria, codes, photometry, and calculations. The process of designing, testing, and integrating a custom luminaire that met these criteria is described.

PHOTOMETRIC MEASUREMENTS OF TRAFFIC SIGNS AS A FUNCTION OF PAVEMENT REFLECTANCE AT GRAZING ANGLES

P.J. CARLSON, T. URBANIK II

In representative combinations of vehicular lights and roadway surfaces, measurements showed that light from automotive headlamps, reflecting off the roadway and incident on traffic signs, produced only negligible sign luminance compared to that produced by direct illumination from headlights.

WHITE COMPLEMENTARY SOLID-STATE LAMP

P. VITTA, A. ŽUKAUSKAS, R. GASKA, M.S. SHUR

A phosphor-conversion white LED was combined with red-orange and cyan LEDs to produce a source with a CCT of 5400 K and very good color rendering characteristics.

PERFORMANCE OF THE FIRST GENERATION OF HID HEADLAMPS IN THE U.S

M. SIVAK, M.J. FLANNAGAN, B. SCHOETTLE, Y. NAKATA

Illuminances from projector and nonprojector HID low-beam automotive headlights used in the model year 2000 were determined. Comparison was made with tungsten-halogen lamps to show the different roadway lighting characteristics of these sources .

LUMINAIRE DIRT DEPRECIATION FOR AN INDIRECT LIGHTING SYTEM

R.G. DAVIS, G. PARTRIDGE

Measurements were made of the illuminances produced by an indirect lighting system, before and after cleaning. The light-loss was found to be in alignment with recent studies, and lower than values predicted by the current design procedure.

A MODEL FOR MASS LOSS IN BURNED-OUT FILAMENTS OF INCANDESCENT LAMPS

V.J. MENON, D.C. AGRAWAL

The relevant heat and evaporation equations were solved analytically to generate a model that predicts the mass loss of a straight tungsten filament vacuum lamp at burn-out. Reasonable agreement with experiment was obtained.

CONSTRAINT SATISFACTION SOFTWARE FOR ARCHITECTURAL LIGHTING DESIGN: A CASE STUDY

M. MOECK

A software system is described that used constraint satisfaction optimization, combined with heuristics, to calculate permissible luminaire locations and orientations for a lighting system that achieved a specified set of lighting design criteria.