Near-Field photometry describes the spatial flux distribution of a luminaire in a manner that permits accurate illuminance calculations at close distances. Application distance photometry, a method of near-field photometry, uses test distances that equal the distances at which lighting application and illuminance calculations are made.It provides intensity distributions for many test distances.

IES LM-70-00
Original price was: $158.00.$79.00Current price is: $79.00.
IESNA Approved Guide to Near-Field Photometry
Illuminating Engineering Society , 02/26/2000