left shadow main shadow main shadow
main shadow
Ld logo
Professional Ligting top_banner
Home top navigation Jobs/Events/News top navigation Catalogs top navigation Manufacturers top navigation Lighting Products top navigation Newsletter Sign-Up top navigation Apps_Blogs top navigation Lighting Feeds
Subpage Top Grad
Indoor Lighting
Left Navigation
Outdoor Lighting
Left Navigation
LED Lighting
Left Navigation
Ballast/Transformers
Left Navigation
Controls
Left Navigation
Lamps/LED
Left Navigation
Emergency/Exit
Left Navigation
Site Sponsors
Sponsors Images
Sponsors Images
Sponsors Images
Sponsors Images
Sponsors Images
Sponsors Images
Sponsors Images
Sponsors Images
Sponsors Images
Sponsors Images
Sponsors Images
Sponsors Images
Sponsors Images
Sponsors Images
Sponsors Images
Sponsors Images
Sponsors Images
Sponsors Images
Sponsors Images
Sponsors Images
Sponsors Images
Sponsors Images
Sponsors Images
Sponsors Images
Sponsors Images
Sponsors Images
Sponsors Images
Sponsors Images
Sponsors Images
Sponsors Images
Sponsors Images
Sponsors Images
Sponsors Images
Sponsors Images
Sponsors Images
Industry News
Absolute Photometry And The EULUMDAT Format
September 3, 2009

Lighting Analysts, Inc. announces a joint proposal with DIAL GmbH and byHeart Consultants to introduce a modification to
the EULUMDAT photometric format to recognize absolute photometry.

Absolute Photometry and the EULUMDAT Format

The Illuminating Engineering Society (IES) has recently published guidelines with respect to the photometric testing and representation of Solid State Lighting (SSL) products in the form of publication LM-79-2009. This document states that SSL products
shall be tested using the absolute method of luminaire photometry and represented to the industry as such.

The IES document on photometric format, LM-63-2000 (and previous versions) includes a provision to handle the presentation of absolute photometric data. However, the most common photometric format used in Europe, the EULUMDAT format developed by Dr. Axel Stockmar, does not currently include such a provision.

Recognizing this potential problem, a joint effort between DIAL GmbH, the authors of the DIALux software, Ian Ashdown of byHeart Consultants, author of Helios calculation and rendering technology and Lighting Analysts, Inc., authors of the AGi32 and Photometric Toolbox software programs, has resulted in a simple and elegant way to handle absolute photometry within the current EULUMDAT file specification. This is an interpretative change only and is fully compatible with all existing EULUMDAT files.

DIAL, byHeart and Lighting Analysts have agreed to modify their respective software programs to recognize these modifications within EULUMDAT format files on the next release to facilitate the use of absolute photometry by European lighting product
manufacturers.

With our deepest respect to all manufacturers, laboratories, and software vendors, we present this unified approach in hope that it will be recognized and employed quickly to smooth the way for the acceptance of SSL products within the European market and
others utilizing the EULUMDAT standard.

The changes in interpretation of the EULUMDAT format to accommodate absolute photometry are available on the following internet sites:

www.agi32.com
www.dial.de
www.helios32.com

Trans
Banners
Banners
Banners
Trans Trans
Trans
Main Shadow Right
Indoor Lighting  |   Outdoor Lighting  |   LED Lighting  |   Ballast/Transformers  |   Controls  |   Lamps/LED  |   Emergency/Exit  |   Manufacturers  |   Lighting Products  |   Events  |   Jobs  |   Industry News  |   New Catalogs  |   Site Map  |   Advertising Information
LIGHTDIRECTORY - LightDirectory.com, P.O. Box 1768, Higley AZ, 85236.
Trans