Measurements
Birds and feed were weighed on one, 14, 21 (d be-fore initiation of light intensity treatments), 28, 42, and56 d of age for the computation of BW and feed intake(FI). Cumulative biweekly FI was calculated by sub-tracting the remaining feed weights in the feeders fromthe initial feed-added weights in the feeders. The inci-dence of mortality was recorded daily. Necropsies andcause of death (when determined) were performed on allbirds that died during the trials. Cumulative BW andFI were recorded from each room at biweekly intervals.Cumulative biweekly BW gain (BWG) was calculatedby subtracting initial (d 1) BW from the current BWof the birds. Feed conversion ratio (FCR)wascalcu-lated by dividing FI with BWG, and it was correctedfor mortality