2 New CCTs Published In ANSI C78.377-2024

ANSI recently published ANSI C78.377-2024: Electric Lamps – Specifications for the Chromaticity of Solid-State Lighting (SSL) Products. It covers the range of chromaticities recommended for general solid-state lighting (SSL) products so that the white light chromaticities of the products can be communicated to both commercial and residential consumers. The color appearance of SSL sources is defined by their correlated color temperature (CCT).

In this 2024 revision to ANSI C78.377, specifications for nominal CCTs of 2000K and 1800K are added to cover LED products for some outdoor and special indoor applications, based on the proposed expanded quadrangles of Esposito and Radetsky [2023]. These additions are driven by market needs for standard chromaticity specifications to replace high pressure sodium sources. Annex F, Specifications for 2000K and 1800K provides more information.

ANSI C78.377-2024 applies to LED lamps, LED light engines, and LED luminaires for general lighting applications and may apply more broadly. This standard does not apply to lighting fixtures sold without a light source; it does not apply to SSL products for some indoor applications that intentionally produce colored light.

The new ANSI C78.377-2024 standard can be purchased here.

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David Shiller

David Shiller is the Publisher of LightNOW, and President of Lighting Solution Development, a North American consulting firm providing business development services to advanced lighting manufacturers. The ALA awarded David the Pillar of the Industry Award. David has co-chaired ALA’s Engineering Committee since 2010. David established MaxLite’s OEM component sales into a multi-million dollar division. He invented GU24 lamps while leading ENERGY STAR lighting programs for the US EPA. David has been published in leading lighting publications, including LD+A, enLIGHTenment Magazine, LEDs Magazine, and more.

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