TY  - BOOK
AU  - Helms, Ronald N.
TI  - Illumination engineering for energy efficient luminous environments
SN  - 0134508092
AV  - TK4175.H45 
CY  - Englewood Cliffs, N.
KW  - Electric lighting
KW  - Lighting
KW  - Electric power -- Conservation
KW  - TK
N1  - Includes bibliographical references and index
ER  -