Related Experiment Video
Updated: Sep 10, 2025

Light Spot-Based Assay for Analysis of Drosophila Larval Phototaxis
Published on: September 27, 2019
A multi-functional nine channels full-spectrum light emitting diode color temperature palette
Jingjing Liang1,2, Hui Cao1, Donghua Xu3
1School of Computer Science (School of Artificial Intelligence), Guangzhou Maritime University, Guangzhou, China.
None:
A multi-functional nine-channel full-spectrum light emitting diode color temperature palette is proposed. The color temperature (CCT) of the palette can be continuously tuned at 1K interval within the range of 2500K-6500K. A high color rendering index (CRI) is achieved, with Ra > 94 and R1-R15 > 90. A fidelity index (Rf) greater than 91 is obtained, and the gamut index (Rg) within the range of 96 ≤ Rg ≤ 104 is achieved. Additionally, A chromaticity deviation (Duv) within the range of |Duv| < 0.001 is realized. The circadian effect with melanopic efficacy of luminous radiation(MELR) of 0.6 mW/lm-1.14 mW/lm and circadian action factor(CAF) of 0.289 blm/lm-0.656 blm/lm are obtained. To verify the theoretical model's stability, the Gaussian distribution function of monochromatic LED spectrum is adjusted to induce a 5% asymmetry in integral areas, and the FWHM is offset by ±10%, simulating the non-ideal conditions in practical applications to assess the model's robustness. The color temperature palette enables precise control and reproduction of CCT of sunlight with corresponding circadian effect, which is of positive significance for visual fields such as photography or art exhibitions and regulation of circadian rhythm.
Related Concept Videos
Color Vision
Channel Rhodopsins
Rhodopsins belong to the family of cell surface proteins called G-protein coupled receptors,...
Flame Photometry: Lab
Flame Photometry: Overview
IR Spectrum
Transmittance is defined as the ratio of the radiant power passing through a sample to that from the radiation's source. Multiplying the transmittance by 100 gives the percent transmittance (%T), which varies between 100% (no absorption) and 0%...
Photoluminescence: Applications

