FIGURE 4.

Accumulated number of birds that were culled by leg-problems and mortality in four different lighting programs (5 lx, 20 lx, NL, and VL) at different ages. (A) In each section of trial 1 and 3, the accumulated number of birds that were culled because of leg-problems and total dead birds were obtained from day 7 to day 14 (Day 14), day 7–28 (Day 28) and day 7–49 (Day 49). (B) Accumulated mortality from trial 1 and was obtained from day 7 to day 14 (Day 14), day 7–28 (Day 28) and day 7–49 (Day 49). Data (mean ± SEM) were compared among treatments. Different lower-case letters above the bars denote significant differences (p < 0.05) among groups, where a>b>c>d>e>f and a,b is not different from a or b.