Marshall Design, Inc.

David M. Keith

Principal, vita available here. A resume focusing on recent work in exterior lighting is available here.

Alliance for Lighting Information

is supported in part by Marshall Design and provides information about lighting - particularly the costs and impacts of outdoor lighting

Boulder County Court House Project

lighting the building and plaza on the Pearl St Mall in Boulder

Peak Occupancy Data

research carried out by Marshall Design, Inc. on office occupancy patterns

Summary of Occupancy Savings Information

provides a brief overview of the results of research carried out by Marshall Design, Inc. on office occupancy patterns and the potential savings in energy and electrical demand from applying occupancy sensors as lighting controls

Roadway Lighting Research

supported by Marshall Design, Inc., evaluating the energy and environmental effects of roadway lighting

RoadSoft

software for evaluating roadway lighting design, compliant with the current American National Standard Practice for Roadway Lighting, ANSI/IES RP-8-00

Sources, Surfaces and Scatter

is a Powerpoint presentation about the interaction of light sources, roadway surfaces and atmospheric scattering, based on a paper (available here in pdf format) by Jefferey Knox and David Keith presented to the IESNA Roadway Lighting Committee and to the International Dark-sky Association in March 2003

Street and Area Lighting Committee 2001

conference included a Powerpoint presentation by David Keith about his research into Unit Power Density (UPD), with special emphasis on the potential reduction of uplight.

Technical Summary of Research into UPD and UUD

is a (browser version of a) reveiw of the work, results and conclusions from four papers by David Keith published in the Journal of the IESNA since 2000 (and the document in pdf format is here.)

Unit Uplight Density (UUD)

examples are included in the SALC presentation, and a report with example calculations is available here. The photometric files used in these examples are available here.