The spectral distribution of the Blue, Blue-Enriched, Blue-Medium, Blue-Depleted and Green LED arrays.

<p>The power, current and voltage of each LED array were the same: 2.2 W, 40 mA and 220 V, respectively. Each LED array was controlled by a pulse width modulation (PWM) driver to maintain light intensity at the exact same level.</p

Body mass (g) in chickens reared under different polychromatic light spectra.

<p>Each group of treated birds was exposed to either monochromatic light spectra (Green and Blue groups) or green-blue dual light spectra with depleted, medium and enriched blue component (Blue-Depleted, Blue-Medium and Blue-Enriched groups, respectively) from 1 day of age until termination of the experiment at 81 days of age. Body mass was individually measured at 45, 60, 72 and 81 days of age, and the average body mass was calculated. Data are expressed as the mean value ± SEM (n = 20). Bars marked with different letters are significantly different from each other (<i>P</i><0.05).</p

Parameter estimates obtained by nonlinear regression of body mass vs. age.

1<p>W is body mass (g) at age t (d), a is asymptotic body mass reached as t →∞, and k is maturing rate (d⁻¹); ln(b)/k represents the inflection point or maximum growth age, and R² is a measure of regression fit.</p><p>Parameter estimates obtained by nonlinear regression of body mass vs. age.</p

Comparison of body mass (g) in chickens exposed to three blue component levels of polychromatic light spectra: depleted, medium and enriched blue component.

<p>Data are expressed as the mean value ± SEM (n = 20). Bars marked with different letters are significantly different from each other (<i>P</i><0.05).</p

Abdominal adipose weight of 81-day-old chickens reared under different polychromatic light spectra.

<p>At the end of the trial, after being fasted for 12 h, birds from each replicate were killed by exsanguination, plucked, and eviscerated to measure weights of abdominal adipose. Data are expressed as the mean value ± SEM (n = 6). Bars marked with different letters are significantly different from each other (<i>P</i><0.05).</p

Body temperature (°C) of 81-day-old chickens reared under different polychromatic light spectra.

<p>At the end of the trial, body temperature was measured using an infrared thermometer. Data are expressed as the mean value ± SEM (n = 20). Bars marked with different letters are significantly different from each other (<i>P</i><0.05).</p

The positive relationship (R² = 0.7664, <i>P</i> = 0.0001) between final body mass and food intake of chickens reared under different polychromatic light spectra.

<p>The positive relationship (R² = 0.7664, <i>P</i> = 0.0001) between final body mass and food intake of chickens reared under different polychromatic light spectra.</p

Blood biochemistry parameters (mmol/L) of 81-day-old chickens reared under different polychromatic light spectra.

<p>A. low-density lipoprotein cholesterol (LDL-CH), B. high-density lipoprotein cholesterol (HDL-CH), C. total cholesterol (TC), D. total triglyceride (TG) and D. glucose (GLU). Data are expressed as the mean ± SEM (n = 6). Bars marked with different letters are significantly different from each other (<i>P</i><0.05).</p

The positive relationship (R² = 0.6406, <i>P</i> = 0.0001) between the glucose (GLU) concentration and the final body mass of chickens reared under different polychromatic light spectra.

<p>The positive relationship (R² = 0.6406, <i>P</i> = 0.0001) between the glucose (GLU) concentration and the final body mass of chickens reared under different polychromatic light spectra.</p

The virtuous cycle of research.

A visualization of how our proposed paradigm shift could start a virtuous cycle that empowers researchers and better science.</p