Perceptual responses to LED illumination with colour rendering indices of 85 and 97

M. Wei, K. W. Houser, A. David, M. R. Krames

Research output: Contribution to journalArticlepeer-review

37 Scopus citations

Abstract

A light source's ability to render colours and whites is one aspect of lighting quality. Since better colour rendition generally comes with a penalty in luminous efficacy, it is reasonable to consider the balance: Should colour and whiteness rendition be sacrificed to achieve higher efficacy? Here, we investigate perceptual responses under illumination from two sources, a blue-pumped LED with a colour rendering index of 85 (BLED85), and a violet-pumped LED with a colour rendering index of 97 (VLED97). Forty-eight participants completed three experiments. Neutral, red, and pink were preferred under VLED97. Skin rendition was preferred by Caucasians under VLED97; Asians had no preference. Teeth and a white shirt were whiter and more preferred under VLED97. We conclude that the colour and whiteness rendition must be considered on a par with luminous efficacy.

Original languageEnglish (US)
Pages (from-to)810-827
Number of pages18
JournalLighting Research and Technology
Volume47
Issue number7
DOIs
StatePublished - Nov 1 2015

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

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