The effects of red and white LED lighting on laying performance in hens over 72 weeks of age

Authors

DOI:

https://doi.org/10.17159/sajas.v55i10.04

Keywords:

egg production, light colour, photoperiod

Abstract

Artificial lighting has enabled improvements in egg production, and different types of light and wavelengths have been tested to achieve better production results in the past. It has been established that red light positively affects the laying performance of hens when such a lighting programme is applied prior to sexual maturation. However, few studies have investigated the effects of light colour on the performance of laying hens during the final stages of production. This study examined the effects of supplementing natural light with white or red lighting during the autumn–winter season on the laying performance, feed intake, average egg weight, egg mass, and feed conversion per egg of laying hens, and the albumen height, yolk colour, and Haugh units of their eggs. The effects on shell thickness, shell strength, body mass, ovary weight, and oviduct weight were also assessed. A total of 7680 70-week-old Lohmann LSL laying hens housed in four California-type sheds were used in the study. Hens exposed to the white light treatment had significantly heavier ovaries; however, no significant differences between red and white lighting were found among the other evaluated variables.

(Submitted 11 May 2025; Accepted 30 September 2025; Published 14 October 2025)

Author Biographies

  • N.M.P. Monteiro, Department of Agricultural Sciences, State University of Northern Paraná (UENP), Luiz Meneghel Campus, 86360-000, BR-369, s/n, Bandeirantes/Paraná State, Brazil

    Graduated in Veterinary Medicine from the State University of Northern Paraná (UENP) in 2020 and obtained a Master's degree in Agronomy (Sustainable Production) from the same institution in 2023. She has experience in public health, health surveillance, inspection and monitoring of animal products, zoonosis control, and animal welfare promotion. She works as a veterinarian for the Municipality of Barra do Jacaré in the Health Surveillance Department and for the Municipality of Itambaracá in the Animal Products Inspection Service (SIPOA). Her activities include establishment inspections, quality control, food safety, and compliance with health regulations. She is interested in topics related to One Health, food safety, inspection and technology of animal products, and management and public policies related to animal health and production.

  • D. Sato, Department of Agricultural Sciences, State University of Northern Paraná (UENP), Luiz Meneghel Campus, 86360-000, BR-369, s/n, Bandeirantes/Paraná State, Brazil

    He has a PhD by the Department of Preventive Veterinary Medicine and Animal Health (VPS) of the Faculty of Veterinary Medicine and Animal Science (FMVZ) of the University of São Paulo (USP), and a Master's degree from the Faculty of Animal Science and Food Engineering (FZEA) of the University of São Paulo. Veterinarian from the State University of Northern Paraná (UENP). He has experience in the areas of animal welfare, poultry and pork production, 3D modeling and printing, product design, computer vision and artificial intelligence.

  • B.D.R. Bombem , Department of Agricultural Sciences, State University of Northern Paraná (UENP), Luiz Meneghel Campus, 86360-000, BR-369, s/n, Bandeirantes/Paraná State, Brazil

    A fifth-year Veterinary Medicine student at the State University of Northern Paraná. She completed a voluntary internship during her summer vacation in the Sheep and Goat Research, Extension, and Production Department (PEPOC) at the State University of Northern Paraná and a voluntary internship in the Equine Breeding, Animal Reproduction, and Large Animal Clinical and Surgery Departments at the university's Veterinary Hospital. She also completed an internship in the Department of Anaesthesiology of the Veterinary Hospital and has experience in small animal clinical and surgical practice and clinical laboratory work. She was a student representative of the Veterinary Medicine program on the Board's Executive Committee (CEC) and a student representative on the board. She also serves as Secretary at the 9 de September Academic Centre, served as Secretary, and is currently the Vice President of the Feline Study Group (GEFEL). She is a student representative on the university's Teaching, Research, and Extension Council (CEPE) and an alternate member of the Deliberative Council. She taught Anatomy for the Agronomy course and Histology for the Veterinary Medicine course.

  • J.E. Moraes, São Paulo State Agency for Agribusiness Technology, Institute of Animal Science, 13380-011 Heitor Penteado Street, 56, Nova Odessa/São Paulo State, Brazil

    He holds a degree in Animal Science from the Universidade Estadual Paulista Júlio de Mesquita Filho (2002), a Master's degree in Sustainable Animal Production from the Instituto de Zootecnia - Governo do Estado de São Paulo (2011), and a PhD in Experimental Epidemiology Applied to Zoonoses from the Faculty of Veterinary Medicine and Animal Science (2018). He is currently a level VI scientific researcher at the Instituto de Zootecnia of the Agência Paulista de Tecnologia dos Agronegócios. He has been a member of the Animal Use Ethics Committee (CEUA) of the Instituto de Zootecnia since October 2018 and the President of the Committee since July 2019. He has held the positions of Deputy Director of the Center for Research and Development of Genetics and Biotechnology of the Instituto de Zootecnia and Deputy Director of the Genetics Laboratory of CPDGB. He is currently a professor of the stricto sensu postgraduate course at the Instituto de Pesca/APTA/SAA, with an emphasis on the welfare and physiology of stress in aquatic organisms. He has experience in the area of Animal Science, with an emphasis on non-ruminants, working mainly on the following topics: poultry farming, pig farming, animal nutrition, animal welfare, sustainability, and wild animals. Ad hoc advisor to Fapesp and reviewer of scientific journals in the area of poultry farming, having received four research awards.

  • D.R. Rodrigues, Department of Agricultural Sciences, State University of Northern Paraná (UENP), Luiz Meneghel Campus, 86360-000, BR-369, s/n, Bandeirantes/Paraná State, Brazil

    He holds a degree in Biological Sciences from the State University of Northern Paraná, Luiz Meneghel Campus. He has experience in Ecology and Botany, with an emphasis on the study of plant populations, tree communities, biodiversity, and forest conservation and regeneration. He holds a master's degree from the Graduate Program in Biological Sciences at the State University of Londrina. He holds a PhD from the Graduate Program in Biological Sciences in the area of Biodiversity and Conservation of Fragmented Habitats at the State University of Londrina, with a period at the Tropical Ecology and Conservation Lab, University of Florida, United States, as a PDSE/CAPES fellow (Process: PDSE 99999.007214/2014-06). He currently works as a Collaborating Professor (Center for Biological Sciences) at the State University of Northern Paraná, Luiz Meneghel Campus, in the area of Ecology (UENP - CLM), teaching subjects at CCA (Center for Agricultural Sciences), CCB (Center for Biological Sciences), and in the Postgraduate Program at PPAGRO (Master's Program in Agronomy).

  • E.P. Porto, Department of Agricultural Sciences, State University of Northern Paraná (UENP), Luiz Meneghel Campus, 86360-000, BR-369, s/n, Bandeirantes/Paraná State, Brazil

    She holds a bachelor's, master's, and doctorate in Animal Science from the State University of Maringá. She is an associate professor at the State University of Northern Paraná, where she has worked since 2009, teaching and holding academic and administrative positions. She teaches Biostatistics and Animal Breeding. She coordinates and participates in research projects focusing on the health, welfare, and performance of production and companion animals. She currently serves as the Director of Institutional Assessment at the UENP.

  • L.O. Silva, Department of Agricultural Sciences, State University of Northern Paraná (UENP), Luiz Meneghel Campus, 86360-000, BR-369, s/n, Bandeirantes/Paraná State, Brazil

    Leandro de Oliveira Silva is a professor in the Department of Engineering and Agronomy at UNOPAR Anhanguera in Bandeirantes, PR. He holds degrees in Architecture and Urban Planning from UNIVERSIDADE PAULISTA (UNIP) in Assis, SP, and Occupational Safety Engineering from UNOPAR Anhanguera in Bandeirantes, PR. He specialises in Structural and Foundation Engineering, Environmental Engineering and Basic Sanitation, and Renewable Energies. He also holds an MBA in Agribusiness and an MBA in Environmental Engineering, both from UNOPAR ANHANGUERA in Londrina, PR. He is currently expanding his academic horizons with a bachelor's degree in Agronomy from UNOPAR Bandeirantes, PR, and a master's degree in Agronomy with a focus on Agricultural Waste Reuse from UNIVERSIDADE ESTADUAL DO PARANÁ (UENP). He is certified in BIM technology by Autodesk (2022) and has experience in architectural design, sustainability projects, and complementary structural, electrical, and plumbing projects. His practical experience in construction is extensive, having worked as a foreman, contractor, and bricklayer for more than 15 years. During his undergraduate studies in Architecture (2012-2017), he honed his skills as a CAD designer and 3D artist. He served as the Municipal Secretary of Public Works, Transportation, and Public Services in the municipality of Santa Amélia, Paraná, in 2024. He is currently a founding partner of LO Arquitetura LTDA, where he has been responsible for designing and executing residential, commercial, and rural projects since 2017. His research areas include renewable energy, sustainable urban and rural construction, biodigesters for the reuse of agricultural waste, and self-sustainable properties. He is passionate about innovative and sustainable solutions to the challenges faced by the modern world.

  • E.R. Duarte, Department of Agricultural Sciences, Northern Paraná University (UNOPAR), 86360-000 Edelina Meneghel Rando Avenue, 151, Bandeirantes/Paraná State, Brazil

    Graduated in law from the University of Northern Paraná (2011). Has experience in the area of law, with an emphasis on law. Graduated in Administration from the University of Northern Paraná (2004). Has experience in the area of administration. Postgraduate degree in Environmental Law from the University of Northern Paraná (2011). Graduated in Agronomy from the University of Northern Parana. 2019. Master in Agronomy from the State University of Northern Paraná (UENP) - Luiz Meneghel Campus. Doctorate from the National University of Argentina - UCES - Theme: Bioinputs in Agriculture

  • M.A.A. Silva, Department of Agricultural Sciences, State University of Northern Paraná (UENP), Luiz Meneghel Campus, 86360-000, BR-369, s/n, Bandeirantes/Paraná State, Brazil

    He holds a degree in Veterinary Medicine from the State University of Londrina (2001), a master's degree in Animal Science from the State University of Maringá (2004), and a PhD in Animal Science from the State University of Maringá (2006). He is currently an Associate Professor at the State University of Northern Paraná (UENP). He has experience in Animal Science, with an emphasis on the production and evaluation of feed for monogastric animals, working mainly on the following topics: swine, poultry, performance, and nutritional management.

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14-10-2025

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Research data can be made available upon request by email to the corresponding author.

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Vol. 55 No. 10 (2025)

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Copyright (c) 2025 Monteiro, N.M.P., Sato, D., Bombem, B.D.R., Moraes, J.E., Rodrigues, D.R., Porto, E.P., Silva, L.O., Duarte, E.R., Silva, M.A.A. (Author)

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Monteiro, N., Sato, D., Del Rey Bombem, B., Evandro de Moraes, J., Resende Rodrigues, D., Paiva Porto, E., de Oliveira Silva, L., dos Reis Duarte, E., & Augusto Alves da Silva, M. (2025). The effects of red and white LED lighting on laying performance in hens over 72 weeks of age. South African Journal of Animal Science, 55(10), 492–503. https://doi.org/10.17159/sajas.v55i10.04
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