An Approach for Designing Mixed Light-Emitting Diodes to Match Greenhouse Plant Absorption Spectra

Abstract

We report a methodological approach for simulating luminary output radiation, which is achieved by mixing light-emitting diodes (LEDs) in order to match any plant absorption spectrum. Various recorded narrow-band LED spectra of different colors were first characterized and then fitted with a multi-Gaussian model. An optimizing procedure computed the optimal weighting of the relevant parameters so as to minimize the discrepancy between the combined spectrum and the reference target curve. The particle swarm optimization (PSO) method was applied because it is the most suitable technique for mono-objective situations. Within the useful spectral interval, the worst relative standard deviation between the optimized curve and recorded LED spectral power distribution (SPD) was 3.4%. When combining different LED types, the simulated light output showed that we could limit ourselves to selecting only five colored sources. This work will help us to design an optimized 200W laboratory luminaire with a pulse-width switched-mode power supply.

The Future of Interior Lighting Is Here

“…The Special Issue, entitled "The Future of Interior Lighting Is Here", addressed several subjects on interior lighting such as architectural lighting, daylighting, Human Centric Lighting (HCL), the impact on human health, lighting design, sustainability, and social impact and wellbeing. A total number of eleven articles, ten research papers [24][25][26][27][28][29][30][31][32][33] and one review paper [34], were published. In terms of the geographical distribution of the affiliations of the 34 contributing authors, contributions originated from ten countries, including Austria, Denmark, France, Germany, Korea, Slovakia, Spain, Sweden, Tunisia, and UK.…”

“…Bachouch et al [29] reported a methodological approach for simulating luminaires' spectrum for greenhouse plants. That was achieved by mixing LED chips in an effort to match the absorption spectrum of any plant.…”

Development of an Efficient Optical Model for Leds-Based White Light Spectrum Design Applications

“…Using Grassmann's color mixing theory, phosphor coated warm white LED source (CCT 2800 K) is mixed with the blue (467 nm) and green (527 nm) LED light sources and a detailed mathematical formulation is derived for easy controlling of variable CCT and experimentally validated (Wu et al 2017). Bachouch et al (2021)reported a methodological approach for simulating luminary output radiation, which is achieved by mixing light-emitting diodes (LEDs) in order to match any plant absorption spectrum. Various recorded narrow-band LED spectra of different colors were first characterized and then fitted with a multi-Gaussian model.…”

“…Unlike previous approaches that require multiple measurements with a spectrometer or a reference color chart under a target illumination environment, our method requires no additional information for the spectral upsampling step (Das & Mazumdar 2021) Chen et al ( 2022) reported a design method for a high-power optical system based on RGB LED Arrays with multiple channels to achieve highquality color-mixing and uniform lighting. The highpower optical system consists of a multi-channel reflector and a color-mixing component (Bachouch et al 2021). Onwukaeme, Lee and Ryu (2023).…”

Emission spectrum modeling of white LEDs light source with using Gaussian function

“…Bachouch et al reported a methodological approach for simulating luminary output radiation, which is achieved by mixing light-emitting diodes (LEDs) to match any plant absorption spectrum. Various recorded narrowband LED spectra of different colors were first characterized and fitted with a multi-Gaussian model [11]. Liu et al used the double Gaussian model to describe the SPD of a single GaN chip or a single QD system.…”