American National Standards Institute eStandards Store Home page Shopping Cart Alert me My account Download Frequently asked questions Terms Of Use Help
ANSI Standards Store ANSI Standards Store
AAMI - Medical Device Standards SIA - Scaffold Standards NEMA - Electrical Standards BSI - British Standards Institution ASTM International Standards DIN - German Institute for Standardization ISO Environmental Management Standards
Browse Standards

Browse ISO Standards
Browse IEC Standards

View all publishers

View All Standards Packages
Bookmark and Share
ANSI Blog    Follow ANSI on Twitter    Follow ANSI on Youtube
Follow ANSI on LinkedIn    Follow ANSI on Google Plus    Follow ANSI on Facebook
Get Adobe Acrobat Reader
Get File Open Plug-In

ANSI E1.48-2014


A Recommended Luminous Efficiency Function for Stage and Studio Luminaire Photometry

ANSI E1.48 specifies an luminous efficiency function V(lambda) that more accurately represents human eye response than many other V(lambda) functions often used when measuring light energy and then expressing it in units that represent the human eye response, such as lux, lumens, and candela. The function recommended in E1.48 results in a more accurate rendering of perceived brightness, particularly with narrow-band sources that have significant energy at the extreme ends of the spectrum, than do other commonly used V(lambda) functions.
Learn more about Site Licenses

Would you like to Email to a friend? If you would like to Email a friend a link to this item please Login Questions?


ANSI Copyright
eStandards Store home page Cart Alert Account Download Frequently Asked Questions Privacy Policy Contact Us Help