PROCEDURES
,LIGHTING FUNDAMENTALS
• A basic understanding of lighting
fundamentals is essential for specifiers and
decision-makers who are evaluating lighting
design and processes.
,ILLUMINATION
•QUANTITY OF ILLUMINATION
•QUALITY OF ILLUMINATION
, QUANTITY OF ILLUMINATION
Light Output
• The most common measure of light output (or luminous flux) is
the LUMEN. Light sources are labeled with an output rating in
lumens.
• As lamps and fixtures age and become dirty, their lumen
output decreases (lumen depreciation occurs).