Broiler Chicken Lighting Welfare Research

Lighting conditions in broiler chicken houses have significant welfare implications for bird health, behavior, and stress levels, with evidence supporting specific photoperiod and intensity requirements for optimal welfare.

Key Facts

Standard commercial broiler houses typically use continuous or near-continuous lighting to maximize feeding time and growth
Research shows photoperiods with at least 6 hours of darkness significantly improve leg health and reduce mortality
Low-intensity lighting reduces activity and may limit expression of natural behaviors including foraging and dustbathing
Broilers exposed to natural light or enriched lighting programs show better behavioral indicators of positive welfare
EU welfare directives require minimum 6 hours of darkness in 24-hour periods for broiler chickens

Welfare Considerations

Lighting manipulation in broiler production has historically prioritized growth efficiency over bird welfare. Continuous light disrupts circadian rhythms, causing chronic sleep deprivation and increased susceptibility to metabolic disease. Dark periods allow normal rest behavior and significantly improve leg health, which is one of the most significant welfare problems in broiler production. Providing higher light intensities during active periods and appropriate dark periods represents an achievable welfare improvement across commercial production.

What You Can Do

Choose broiler chicken products certified to welfare standards that include lighting requirements
Support organizations advocating for mandatory dark periods and appropriate light intensities in broiler houses
Advocate for EU lighting standards to become mandatory globally for broiler production
Learn about broiler welfare issues and how lighting connects to other aspects of bird health
Reduce chicken consumption or choose higher-welfare certified products as systemic change develops