60 60 POINTS TO CONSIDER Never increase the hours of light during the growing period until the planned stimulation. Additionally, never reduce the length of the lighting day during the laying period. It is crucial for breeder flocks to achieve a proper increase in egg size from the start of lay to maximise the percentage of hatching eggs of suitable weight, which will produce high-quality chicks. Ensure that daylight hours are consistent between the rearing house and the production facility when transferring birds. Proper light placement is crucial in poultry systems. It's essential to have independent and dimmable controls. A well-positioned lighting system that provides even light distribution at bird level can eliminate dark corners and shadows, which can lead to floor eggs and undesirable behaviour. LIGHT SOURCES IN POULTRY HOUSES A wide range of lighting options is available for use in poultry houses, from traditional incandescent bulbs to advanced LED (light-emitting diode) systems. Each type of lighting presents distinct advantages and disadvantages, making it important to select the most suitable option based on the specific needs of the flock and the housing environment. In recent years, LED lamps have become increasingly prevalent in poultry facilities. Their popularity can be attributed to their extended lifespan, significant energy efficiency, and reliable performance. These features make LEDs a favourable choice for modern poultry operations seeking both cost-effectiveness and consistent lighting quality. It is vital to remember that poultry have unique visual capabilities, which means that not all light sources are appropriate for them. Research has shown that different colours within the light spectrum can affect chickens in various ways, underscoring the need for careful selection of lighting systems. When choosing a light source, it is essential to purchase from reputable manufacturers who supply comprehensive specifications. The ideal light source should possess a broad spectrum that closely replicates natural daylight, supporting the welfare and productivity of the birds. Additionally, it is highly recommended to use flicker-free lighting with a colour rendering index (CRI) greater than 90%, as this ensures optimal visual conditions for the flock. LOHMANN › MANAGEMENT GUIDE › LIGHTING
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