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Effect of Light Intensity Adjusted for Species‐Specific Spectral Sensitivity on Live Performance and Processing Yield of Male Broiler Chickens1

SUMMARY Adoption of alternative lighting systems to replace traditional incandescent light sources offers the opportunity to tailor lighting systems according to spectral sensitivity needs of different species. Providing a lighting environment that accounts for poultry vision may improve bird welfare and production efficiency. This study examined live performance and carcass yield in male broilers reared to 56 d of age exposed to each of 2 LED light sources (red‐supplemented vs. un‐supplemented) adjusted to either human spectral sensitivity (lux) or poultry spectral sensitivity (clux) arranged in a 2 × 2 factorial. Body weight, body weight gain, feed intake, feed conversion, and mortality were not different among treatments. The data herein illustrate that broad spectrum lighting sources should not be expected to improve live performance or processing yields and design of lighting systems and programs is primarily an economic decision driven by capital and operation costs.