“(Japanese)
farmers have already begun
installing LEDs at their facilities because the energy-efficient lights help
reduce electricity bills, but the center also found they can prevent aggressive
behavior among chickens…researchers found that roosters raised under yellow
LEDs consumed the least amount of food but still grew the most during the test
period…no signs of aggressive behavior were detected when yellow LEDs were used.”
Source: Aichi investigates effect of LEDs on rearing poultry
Japan Times
October 6th 2012