UNLIMITED FREE ACCESS TO THE WORLD'S BEST IDEAS

close
Already an Engineering360 user? Log in.

This is embarrasing...

An error occurred while processing the form. Please try again in a few minutes.

Customize Your Engineering360 Experience

close
Privacy Policy

This is embarrasing...

An error occurred while processing the form. Please try again in a few minutes.

IES TM-24

TECHNICAL MEMORANDUM: AN OPTIONAL METHOD FOR ADJUSTING THE RECOMMENDED ILLUMINANCE FOR VISUALLY DEMANDING TASKS WITHIN IES ILLUMINANCE CATEGORIES P THROUGH Y BASED ON LIGHT SOURCE SPECTRUM

active, Most Current
Buy Now
Organization: IES
Publication Date: 27 May 2020
Status: active
Page Count: 31
scope:

This TM documents the fundamentals of visual efficiency, defines the EVE calculation method, and addresses practical concerns for implementation. The EVE method described herein should not be applied if any of these conditions apply:

• The task or tasks are covered by IES Illuminance Categories A through O for the Recommended Illuminance Target1

• The task is nonvisual in nature

• The task is not visually demanding (see Section 2.5)

• The application is exterior

• It is known that there are a high number of occupants with abnormal vision or poor ocular health

Further discussion of the preconditions for application of the EVE method is included in Section 4.5.

The method described in this TM is based on how the SPD of a light source affects the ability to discern achromatic visual detail. The SPD can also affect brightness perception, color rendering, discomfort glare, circadian rhythms, and other physiological outcomes; these factors are discussed only in limited detail in this TM. The decision to apply the EVE method is at the discretion of the specifier.

Document History

IES TM-24
May 27, 2020
TECHNICAL MEMORANDUM: AN OPTIONAL METHOD FOR ADJUSTING THE RECOMMENDED ILLUMINANCE FOR VISUALLY DEMANDING TASKS WITHIN IES ILLUMINANCE CATEGORIES P THROUGH Y BASED ON LIGHT SOURCE SPECTRUM
This TM documents the fundamentals of visual efficiency, defines the EVE calculation method, and addresses practical concerns for implementation. The EVE method described herein should not be applied...
January 1, 2013
An Optional Method for Adjusting the Recommended Illuminance for Visually Demanding Tasks Within IES Illuminance Categories P through Y Based on Light Source Spectrum
Applications and tasks are limited to: 1. Visual tasks for which the IES has designated Categories P through Y as the Recommended Illuminance Target (Refer to Table 4.1, IES Handbook); and 2....

References

Advertisement