64 64 LIGHT INTENSITY Light intensity plays a crucial role in stimulating birds, directly influencing their activity levels, mating behaviours, pecking tendencies, and feather loss. We must always keep in mind that birds perceive light differently from humans, while the parameters commonly used to measure and analyse light are primarily based on human vision rather than avian vision. For instance, using lux as a unit for light intensity may not be always appropriate, as light intensity can vary according to the specifications of the light source, such as type, spectrum and frequency. In general, hens’ perception of light is far greater than ours so any changes should be minimal and gradual. VISION OF POULTRY 3Dimming Having a lighting system with dimming capabilities allows for better behavioural control within poultry houses and helps prevent birds from laying floor eggs in dark areas. Dimming can also be used to reduce the likelihood of pecking and cannibalism as the birds mature. 2Preparation for Production This should be followed by a gradual reduction to a more relaxed light level, preparing the birds for the production house. In general, higher light intensity makes birds more active; however, excessively bright lighting can lead to increased nervousness, raising the risk of vent pecking and mortality, especially when birds are housed at high stocking densities. 4Production In production, it is common to lower lux levels later in the laying period to calm the flock and help minimise aggressive pecking. Once lights have been dimmed during laying, they should not be increased again for the duration of this period. 1Early Days In the early days, high light intensity encourages chicks to explore their surroundings and quickly find water and feed. During the initial stages of rearing, it’s important to keep the flock active, so early stimulation is essential. GRAPHS FOR LUX LEVELS Vision of Poultry LOHMANN › MANAGEMENT GUIDE › LIGHTING
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