Category
Recently Viewed Products
-
CGA F-4
$43.00$25.80 -
CGA C-21
$18.00$10.80 -
BS 10800
$236.22$141.73 -
ESD S541
$169.00$101.40 -
ICEA P-32-382
$89.00$53.40
IES LM-81 – Approved Method: Photometric Testing of Skylights and Tubular Daylighting Devices under Hemispherical Sky Conditions
Unlike electric luminaires, which require only one photometric test, skylights require a separate test to characterize their performance at different sun angles as well as a separate measurement to determine the sky conditions. This document provides the IES recommended uniform method for determining and reporting the photometric characteristics of skylights and tubular daylighting devices that incorporate a means to diffuse the natural hemispherical daylight as the daylight passes through the daylighting system. It describes the procedures followed and the precautions observed in obtaining uniform and reproducible measurements of tubular daylighting devices and skylights with glass or plastic glazing. This document identifies the components and the structure type needed to adequately measure daylighting devices. The procedures, calibration of the equipment, and determination of sun angles and sky conditions are also discussed.
Product Details
- Published:
- 02/07/2020
- ISBN(s):
- 9780879952396
- ANSI:
- ANSI Approved
- Number of Pages:
- 31
- File Size:
- 1 file , 2.3 MB
- Note:
- This product is unavailable in Ukraine, Russia, Belarus
Related products
-
IES TM-32
$50.00$30.00Add to cartTechnical Memorandum: Lighting Parameters For Building Information Modeling
Published by Publication Date Number of Pages IES 2019 19 -
IES RP-8
$300.00$180.00Add to cartRecommended Practice for Lighting Roadway and Parking Facilities
Published by Publication Date Number of Pages IES 11/01/2021 547 -
IES RP-6
$120.00$72.00Add to cartRecommended Practice: Lighting Sports and Recreational Areas, Includes Errata 1 (2021)
Published by Publication Date Number of Pages IES 02/07/2020 102 -
IES RP-43
$120.00$72.00Add to cartRecommended Practice: Lighting Exterior Applications
Published by Publication Date Number of Pages IES 08/01/2022 71