Chicken Lighting Welfare in Poultry Houses

Lighting programs in poultry houses significantly affect broiler and layer hen welfare, influencing behavior, health and stress levels.

Key Facts

Conventional broiler lighting programs historically used near-continuous light to maximize feed intake and growth
Continuous light causes severe sleep deprivation in chickens, reducing immune function and increasing leg problems
Amended lighting programs providing minimum 6-8 hours of darkness per 24-hour period significantly improve welfare
Chickens have four types of cone cells in their eyes and can see UV light - conventional white fluorescent lighting is not ideal
Blue-tinted or full-spectrum lighting may better match chicken visual systems and reduce stress responses
EU welfare legislation for broilers specifies minimum hours of darkness and minimum lux levels in poultry houses

Welfare Considerations

Sleep deprivation is a serious welfare harm in broiler chickens kept under near-continuous lighting. Chickens require darkness for proper circadian rhythm function, immune system regulation and cognitive restoration - the same fundamental biological needs as other vertebrates. Depriving them of darkness to increase feeding time causes measurable physiological deterioration: weaker immune function, higher cortisol, poorer leg health and reduced lifespan quality. Providing minimum 6 hours of darkness improves multiple welfare indicators simultaneously. The shift away from near-continuous lighting programs is one of the most impactful and low-cost welfare improvements available in broiler production. Consumer-facing certification standards that require adequate darkness are driving adoption across the industry.

What You Can Do

Choose chicken from welfare-certified producers that specify adequate rest periods in poultry houses
Advocate for minimum darkness requirements in national poultry welfare regulations
Support research into optimal lighting programs for different poultry species and production systems
Engage with retailer sustainability commitments to include poultry lighting welfare standards