Body weight gain, feed consumption, and age at first
lay were comparable under white, red, or green light,
and differences between means were not statistically
significant (Table 3). However, differences were seen in
performance at the end of wk 22 (F2;21 = 21.55, P <
0.001), when laying performance under red light was
significantly superior to performance under white or
green light, which were not different from each other