Overview of ..
The Energy Efficiency Manual provides an important group
of energy conservation measures that improve the efficiency of lighting
layout and light distribution. You need to understand the concepts
of light intensity and lighting measurement for selecting lamps,
for designing efficient lighting layouts, and for lighting retrofit
Confused about the terminology of lighting units? This Note will
eliminate the confusion. It concisely explains the terms that the
lighting trade uses to communicate about light intensity. The important
terms to understand are lumens, footcandles and lux, and candlepower.
You will also learn the terms used to express the brightness or
luminance of objects, using units of candelas. An understanding
of brightness is important for avoiding glare.