Plant Lighting Spectral Modeling and LED Dimming Control
YU Ling
LIN Weiming
HUANG Shuchen
Abstract：To further optimize the dimming application of multi-color spectra in LED plant lighting,a mathematical model of asymmetric LED spectra based on current influence was proposed by analyzing the spectra of 15 LEDs under different current conditions.RGB and UV LEDs were fitted and validated using this model.To achieve spectral-matching dimming control based on the proposed spectral model,a single-stage AC-DC four-output LED driver circuit was designed,and a dimming control strategy based on spectral requirements was developed.Computer simulations were conducted,and an experimental prototype with a rated power of 70 W and an AC input voltage range of 90～135 V was built to test the proposed circuit and dimming control strategy.Experimental results demonstrated compliance with IEC 1000-3-2 Class C standards and achieved optimal spectral configuration for plant lighting.At an input AC voltage of 90 V,the system efficiency reached a maximum of 83.625％,providing an optimal spectrum to meet plant growth requirements.Both simulations and experimental results validated the effectiveness of the proposed spectral model,driver circuit,and dimming control strategy.
Keywords：LED plant lightingspectral mathematical modelmulti-output single-stage AC-DC driverspectral matchingdimming strategy
Publication Date：2025-12-31
Online Publishing Date：2026-01-08(First online date of this platform, not the publication date of the document)
Pages：11( 79-89 )