Vaibhav S. Galbale, Madhukar S. Zambare, Arvind D. Shaligram, and Kishor M. Sonawane, “Microcontroller-Based Variable-Spectrum LED Illumination for Industrial Ergonomic Optimization: A Controlled Experimental Investigation of Spectral Effects on Worker Productivity and Visual Comfort”, IJCISIM, vol. 18, no. 11s, pp. 283–294, Aug. 2026.