Environmental Effects

Table of Contents

Overview

There is More to Lighting Quality Than What Meets the Eye

presents the issues involved in outdoor lighting quality, recognizing that the visual appearance and performance of a lighting system is only a part of the complete story.

Why MH Systems Cost More Than HPS Systems

discusses the relative costs - in monetary and environmental terms - of choosing Metal Halide or High Pressure Sodium sources for outdoor lighting.

Energy Use

Unit Power Density (UPD)

Equipment

Naomi Miller's Comments on the Efficiency of Full Cutoff Lighting

is a discussion about the way full cutoff luminaires can - and can not - perform.

Roadway Lighting Research

discusses the findings from research into Unit Power Density (UPD) and Unit Uplight Density (UUD), published in four papers by David Keith in the Journal of the IESNA from 2000 through 2003.

Lamp Replacement

Mercury Content of HID Lamps

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