Luminaires, Photometry

Topics relative to luminaire definitions and photometrics.

Why doesn't AGi32 accept my photometric file when other software does?
Occasionally, Lighting Analysts will hear from one of our customers that our software can’t read their photometric file (IES, Eulumdat, TM14)?  Why would th...
Fri, 29 Nov, 2019 at 10:42 AM
Why do some luminaires have Coefficients of Utilizations (CU) values greater than 1.0 (or 100%)?
Since there are no lamp lumens with absolute photometry, all SSL's (LED's) are considered 100% efficient (Efficiency = Luminaire Lumens / Lamp Lumen...
Thu, 16 Feb, 2017 at 1:41 PM
Why can't BUG Rating be calculated for certain photometric files?
Summary: In order to calculate BUG accurately*, the photometric web must include vertical angles from 0-180 degrees if there is any light at 90-degress ver...
Wed, 21 Jun, 2017 at 3:57 PM
Luminaire Mounting Height in AGi32
Question: Is the light source always located at the Mounting Height (MH) value in the luminaire toolkit? Answer: No, not always. It depends on the calculat...
Thu, 6 Jul, 2017 at 4:47 PM
Type A, Type B and Type C photometry
This article discusses the three photometric data categories: Type A, Type B and Type C. These types describe the photometric web surrounding the light sour...
Wed, 20 Feb, 2019 at 8:35 AM
Non-Standard Luminous Shapes
Our friends at LTI Optics documented how to properly handle non-standard luminous shapes such as rings and long (straight or curvy) linear luminaires. N...
Mon, 25 Feb, 2019 at 11:42 AM