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Determination and Measurement of Melanopic Equivalent Daylight (D65) Illuminance (mEDI) in the Context of Smart and Integrative Lighting

Trinh, Vinh Quang ; Bodrogi, Peter ; Khanh, Tran Quoc (2023)
Determination and Measurement of Melanopic Equivalent Daylight (D65) Illuminance (mEDI) in the Context of Smart and Integrative Lighting.
In: Sensors, 2023, 23 (11)
doi: 10.26083/tuprints-00024094
Article, Secondary publication, Publisher's Version

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Item Type: Article
Type of entry: Secondary publication
Title: Determination and Measurement of Melanopic Equivalent Daylight (D65) Illuminance (mEDI) in the Context of Smart and Integrative Lighting
Language: English
Date: 19 June 2023
Place of Publication: Darmstadt
Year of primary publication: 2023
Publisher: MDPI
Journal or Publication Title: Sensors
Volume of the journal: 23
Issue Number: 11
Collation: 21 Seiten
DOI: 10.26083/tuprints-00024094
Corresponding Links:
Origin: Secondary publication DeepGreen

In the context of intelligent and integrative lighting, in addition to the need for color quality and brightness, the non-visual effect is essential. This refers to the retinal ganglion cells (ipRGCs) and their function, which were first proposed in 1927. The melanopsin action spectrum has been published in CIE S 026/E: 2018 with the corresponding melanopic equivalent daylight (D65) illuminance (mEDI), melanopic daylight (D65) efficacy ratio (mDER), and four other parameters. Due to the importance of mEDI and mDER, this work synthesizes a simple computational model of mDER as the main research objective, based on a database of 4214 practical spectral power distributions (SPDs) of daylight, conventional, LED, and mixed light sources. In addition to the high correlation coefficient R² of 0.96795 and the 97% confidence offset of 0.0067802, the feasibility of the mDER model in intelligent and integrated lighting applications has been extensively tested and validated. The uncertainty between the mEDI calculated directly from the spectra and that obtained by processing the RGB sensor and applying the mDER model reached ± 3.3% after matrix transformation and illuminance processing combined with the successful mDER calculation model. This result opens the potential for low-cost RGB sensors for applications in intelligent and integrative lighting systems to optimize and compensate for the non-visual effective parameter mEDI using daylight and artificial light in indoor spaces. The goal of the research on RGB sensors and the corresponding processing method are also presented and their feasibility is methodically demonstrated. A comprehensive investigation with a huge amount of color sensor sensitivities is necessary in a future work of other research.

Uncontrolled Keywords: non-visual effects of light, melanopic equivalent daylight (D65) illuminance, mEDI, melanopic equivalent daylight (D65) efficacy ratio, mDER , intelligent and integrated lighting, mDER calculation model, mEDI measurement, mEDI determination
Status: Publisher's Version
URN: urn:nbn:de:tuda-tuprints-240943
Additional Information:

This article belongs to the Special Issue Recent Trends and Advances in Color and Spectral Sensors

Classification DDC: 600 Technik, Medizin, angewandte Wissenschaften > 623.1 Elektrotechnik, Elektronik
Divisions: 18 Department of Electrical Engineering and Information Technology > Adaptive Lighting Systems and Visual Processing
Date Deposited: 19 Jun 2023 13:05
Last Modified: 02 Oct 2023 08:18
SWORD Depositor: Deep Green
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/24094
PPN: 512000638
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