Multi-objective optimization trade-offs for color rendition, energy efficiency, and circadian metrics

The spectral power distribution of light sources can be optimized to achieve optimal target goals, such as energy efficiency, color quality, and circadian synchronization. Although several researchers investigated the optimization of light sources for circadian and color rendition metrics, the complex relationship and trade-offs between three distinct parameters (circadian, color rendition, and energy efficiency metrics) have not been widely investigated. Here, multi- level analyses of four clusters of metrics (radiometric, photometric, colorimetric, and circadian) have been conducted. Metric correlation analysis was conducted for 308 theoretical and commercially available light sources, and results suggest that melanopic irradiance correlates highly with irradiance but does not correlate well with correlated color temperature. There was a negative but weak correlation between circadian metrics and energy efficiency measures. Energy efficiency and color quality were inversely correlated. In the following analysis, the spectra of an 18-channel LED system were optimized using a multi-objective genetic algorithm in several combinations, and the effect of the number and the order of the optimization parameters on metric relationships were analyzed. The number of optimization parameters significantly affected the optimal results. The order of optimization parameters only changed the relationship between color fidelity index and luminous efficacy of radiation but did not have an impact on the color fidelity index and melanopic radiance relationship. There was an inverse relationship between melanopic irradiance and the luminous efficacy of radiation. Trade-off analysis highlights the importance of the order and number of target parameters in the optimization process.

Files

Metadata

Work Title Multi-objective optimization trade-offs for color rendition, energy efficiency, and circadian metrics
Access
Open Access
Creators
  1. Dorukalp Durmus
License In Copyright (Rights Reserved)
Work Type Article
Publisher
  1. Light-Emitting Devices, Materials, and Applications XXV
Publication Date March 5, 2021
Publisher Identifier (DOI)
  1. https://doi.org/10.1117/12.2576421
Deposited November 03, 2022

Versions

Analytics

Collections

This resource is currently not in any collection.

Work History

Version 1
published

  • Created
  • Added SPIE_opt_tradeoff_5.pdf
  • Added Creator Dorukalp Durmus
  • Published
  • Updated