Introduction: Why Lighting Precision Matters

Genetic progress in laying hens and breeding birds has extended production cycles and increased expectations for persistency, feed efficiency, egg mass, and shell quality. As birds are expected to perform over longer periods, consistent environmental management becomes increasingly important.

Genetics establish a bird’s potential, but nutrition, housing, health, management, and environmental conditions all influence the results achieved on the farm.

Lighting is one of the environmental factors producers can actively manage. Beyond providing visibility, it influences biological rhythms, reproductive activity, and bird behaviour. With the right combination of light intensity, spectrum, timing, and distribution, lighting can become a more precise tool for managing the poultry environment.

How Light Influences Bird Behaviour and Biology

Birds perceive light through their eyes and through extra-retinal photoreceptors, including light-sensitive structures in the brain. These systems help birds respond to changes in day length and coordinate biological rhythms, activity, and reproductive function.

Lighting schedules therefore need to be consistent and appropriate for the birds’ age and production stage. Sudden transitions or poorly coordinated environmental cues can disrupt established routines, while well-managed light and dark periods help maintain predictable daily patterns.

The goal is not simply to provide enough light. It is to create a lighting environment that supports the biological and behavioural needs of the birds throughout the production cycle.

From Uniform Illumination to Dynamic Lighting

Traditional lighting layouts often aim to provide consistent illumination throughout a poultry house. Uniformity remains important, but a single lighting level may not address the different needs of every area in a modern multi-tier or cage-free system.

Dynamic lighting allows producers to adjust intensity, spectrum, and timing through programmable lighting recipes. These settings can be adapted to the species, age of the birds, housing design, and management objectives.

Research has shown that poultry responses to light intensity and spectrum can vary with age and production stage. Lighting strategies should therefore be designed around the birds and the specific conditions of the barn, rather than relying on a single setting for every situation.

Using Light Spectrum and Transitions to Guide Behaviour

Light spectrum can influence how birds perceive their environment and respond to different lighting conditions. Research has investigated the effects of different wavelengths on behaviour, stress responses, growth, and reproductive activity. However, outcomes depend on the lighting program and the birds being studied.

Red-spectrum lighting has applications in poultry management, including as a potential short-term intervention in certain situations involving feather pecking or aggression. It should not be treated as a universal solution, and any intervention should be evaluated alongside other aspects of flock management.

Dimming transitions can also support more controlled changes between lighting periods. Dim-to-Red technology allows a gradual transition from warm white light to red light during dimming, rather than an abrupt change to darkness.

In aviary systems, sequential dimming can be used to guide bird movement before lights-off. For example, a carefully designed sequence may encourage birds to move toward elevated tiers and settle in appropriate resting locations. The effectiveness of such a sequence depends on the lighting layout, housing design, and bird management practices.

Light Zoning: Creating the Right Environment in Each Area

Uniform illumination is important for visibility and consistent access to resources. However, modern multi-tier and cage-free housing systems also have distinct functional areas, including feeding zones, scratch areas, nest areas, passageways, and elevated tiers.

Light zoning adds another level of control. Instead of treating the entire barn as one lighting environment, producers can manage luminaires in groups and adjust settings according to the purpose of each area.

With appropriately designed zoning, producers can explore strategies such as:

• Supporting nest use: Adjusting the relative lighting conditions around nests and floor areas to help encourage appropriate nest-seeking behaviour.
• Managing bird distribution: Using intensity differences to influence where birds spend time and reduce unwanted concentrations in particular areas.
• Supporting movement between tiers: Applying staged lighting transitions to encourage movement toward appropriate resting locations before lights-off.
• Adapting to management needs: Making targeted adjustments in specific zones without changing the lighting program throughout the entire barn.

These strategies should be developed and evaluated for the specific housing system and flock. Lighting is one part of effective behavioural management and works alongside nest design, access to resources, stocking density, and daily husbandry.

Connected Control: Turning Lighting Strategy into Daily Practice

A zoning strategy is only useful if producers can manage it consistently and efficiently.

The Interact Agriculture app enables producers to manage lighting recipes, configure zones, and apply temporary adjustments through a central interface. Wireless communication with compatible luminaires allows lighting settings to be managed by zone, supporting changes for different production phases or management requirements.

Recipe storage can help maintain consistency between flocks and across production sites, while temporary overrides provide flexibility when an immediate adjustment is needed.

For producers, this combination of zoning and digital control offers a practical way to implement a more tailored lighting strategy. Rather than relying on manual adjustments throughout the barn, lighting can be organized around defined areas and management objectives.

Coordinating Lighting with the Wider Barn Environment

Lighting does not operate in isolation. Ventilation, temperature, feeding, water access, and daily management routines all influence bird behaviour and performance.

Where compatible systems allow, lighting controls can be coordinated with other barn equipment through appropriate control interfaces, including 0–10 V signals. This can help producers align lighting changes with wider management routines.

Any integration should be designed and validated for the specific equipment and control system. The objective is to provide consistent environmental cues while maintaining appropriate lighting schedules and management practices.

Aligning Environmental Management with Genetic Progress

Modern layers and breeders are expected to sustain productive performance over increasingly demanding production cycles. Achieving that potential requires attention to the full production environment, including housing, nutrition, health, management, and lighting.

Light zoning, spectrum management, and connected controls give producers additional ways to tailor the environment to their birds. When designed around the needs of the flock and supported by sound management practices, these tools can help producers manage behaviour more deliberately and consistently.

Genetics establish potential. The environment and management influence the results achieved. By making lighting more precise, producers can move beyond uniform illumination toward a more responsive approach to poultry-house management.

Better light. Better animals. Better outcomes.