Codes + Standards

Six New IES Standards In The Past Year

Six New IES Standards In The Past Year


The IES has released six new standards during the past IES fiscal year. At a high level, three address ultraviolet (UV) sources, one addresses light pollution / sky glow, one is about controls, and one is about daylighting. Here are the six:


ANSI/IES RP-27.1-22 Recommended Practice: Risk Group Classification and Minimization of Photobiological Hazards From Ultraviolet Lamps and Lamp Systems

Provides risk group classification for all ultraviolet lamp systems, and the measurement conditions for different applications, thus superseding the more general risk group classifications used in ANSI/IES RP-27-20 for UV lamp systems. It includes manufacturing and user safety requirements that may be required as a result of an ultraviolet lamp system being assigned to a particular risk group. The assigned risk group of an ultraviolet lamp system also may be used to assist with any needed risk assessments, e.g., for occupational exposure in workplaces.

ANSI/IES TM-37-22 Technical Memorandum: Description, Measurement, and Estimation of Sky Glow

Human-based light in the night sky mainly originates from outdoor sources intended to enable or enhance use of exterior spaces when natural light levels are insufficient for the intended purpose. To a lesser extent, light at night also comes from building interior lighting that escapes via windows or other means. Sky glow resulting from light reaching the night sky is a distinct phenomenon from other potential undesirable effects of the use of light, such as light trespass or exposure to the direct or reflected glare from an outdoor luminaire (sometimes included under the broader term “light pollution”), or light at night to which an individual may be exposed from interior sources (e.g., televisions, smart phones or tablets, clocks, nightlights). The various effects experienced by an individual would often involve a combination of such sources; this Technical Memorandum (TM) focuses exclusively on the brightness and related characteristics of the night sky and how these are influenced by the human-based light reaching it.

ANSI/IES LP-16-22 Documenting Control Intent Narratives and Sequences of Operations

Provides guidance on the documentation of Control Intent Narratives and Sequences of Operation. It is not intended to be a design guide, but rather a reference manual of best practices on how the design, once formulated, is included in the project documentation and communicated to the construction and commissioning teams.

ANSI/IES LM-83-23 Approved Method: IES Spatial Daylight Autonomy (sDA) and Annual Sunlight Exposure (ASE)

Describes two annual daylight performance metrics, spatial Daylight Autonomy (sDA) and Annual Sunlight Exposure (ASE), which provide two useful dimensions for evaluating daylight performance. Both metrics are generated via a similar computer-based simulation methodology that uses a full year of hourly weather data to calculate illuminance values inside a given architectural space. The sDA metric is distinguished from many others in that it explicitly accounts for the movement of operable shading devices at daylight apertures, which hereafter in this document will be collectively referred to as blinds.

ANSI/IES/IUVA LM-92-22 Approved Method: Optical and Electrical Measurement of Ultraviolet LEDs

Developed by subject matter experts from IES and the International Ultraviolet Association (IUVA), this light measurement standard (LM) provides guidance for the measurement of UV-emitting LEDs, normally available in the form of an LED package, array, or module. Due to the optical characteristics of UV LEDs and their dependence on junction temperature, the only way to obtain reproducible results universally for all types of UV LEDs is by setting them to a specified junction temperature. The test method described in this document sets the UV LED under test to a pre-determined junction temperature for measurement under a continuous-pulse mode of operation. Such a method can establish equivalence of results between the pulse-mode operation (normally performed by UV LED manufacturers) and the DC-mode operation of products in actual-use conditions. This LM describes uniform methods for operation of UV LEDs and test methods for optical and electrical measurements of UV LED output, and provides the grounds for specification of UV LEDs at high-temperature conditions.

ANSI/IES/IUVA LM-93-22 Approved Method: Optical and Electrical Measurements of Far UV-C Excimer Sources

Describes the procedures to be followed and the precautions to be observed in performing uniform and reproducible measurements of the electrical and ultraviolet optical radiation characteristics of far UV-C excimer sources predominantly emitting at a peak wavelength within the far UV-C range (200 nm to 230 nm). The wavelength range for the purposes of this document is 200 nm to 300 nm.

All six of the above new standards can be found in the IES webstore, here.


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