Providing a suitable lighting environment for commercial poultry is essential for physiological processes, ensuring welfare, and achieving production goals. Recent research has shown that poultry house illuminance (intensity) is dependent on ambient sunlight conditions and that control of light leakage can improve live performance. The objective of this study was to evaluate the performance of fan shades for reduction of light leakage and spatial variation of illuminance in commercial broiler houses. Data collection systems were developed to measure whole house illuminance at a fixed point in time (static) and over a 24-h period (temporal) in a house with and without fan shades. Results from static and temporal testing indicate that fan shades significantly reduce light ingress through tunnel exhaust fans and result in reduced whole-house mean illuminance. Whole-house illuminance uniformity was significantly lower (P = 0.0024) in houses with fan shades (CV = 137.4) than those without (CV = 280.8), and an additional 1.25 h of target illuminance levels (≤10 lx) were gained on the day of testing in houses with fan shades installed. Overall, results indicate fan shades are an effective strategy to mitigate light ingress through fans and improve illuminance uniformity within commercial broiler houses.

为商业家禽提供合适的照明环境对于生理过程，确保福利和实现生产目标至关重要。最近的研究表明，禽舍的照度（强度）取决于周围的阳光条件，并且控制漏光可以改善现场性能。这项研究的目的是评估在商用肉鸡舍中减少风扇漏光和降低照度空间变化的性能。开发了数据收集系统，以测量带有风扇罩和不带风扇罩的房屋中固定时间点（静态）和24小时内（整个时间）的整个房屋的照度。静态和临时测试的结果表明，风扇遮挡显着减少了通过隧道排气扇的光线进入，并导致整个房屋的平均照度降低。全屋照度均匀度明显降低（ 装有风扇罩的房屋（CV = 137.4）的房屋的P = 0.0024）比没有风扇罩的房屋（CV = 280.8）的房屋在安装当天的测试日获得了1.25小时的额外目标照度（≤10 lx） 。总体而言，结果表明风扇罩是一种有效的策略，可减轻风扇的光线进入并提高商业肉鸡舍内的照度均匀性。