author(s)
Shaista Saeedatu Nissa, IU Sheikh, MT Banday, AA Khan, Bushra Zaffer and Shehrish Shafiq

abstract
A study was conducted to investigate the effect of different light sources on the performance of broiler chicken during March- April, 2017. One hundred and sixty day old broiler chicks were brooded in battery cages for a week and then distributed randomly into four light treatment groups viz., Natural light (T₁) as Control, Incandescent (T₂), CFL (T₃) and LED (T4) groups having 40 chicks in each which were again subdivided into four replicates of 10 chicks each. The highest body weight was recorded in LED (2180.42±28.57g) and lowest in CFL (2128.33±25.89g) gropus. The results indicated that light sources had no significant effect on the weekly body weight and body weight gain. However, average feed intake was found to be significantly (P≤0.05) higher in Control (3730.65±36.45g) and INC (3762.80±40.36g) groups compared to CFL (3364.28±45.08g) and LED (3323.73± 67.10g). Similarly, the overall FCR was found to be significantly (P≤0.05) better in LED (1.63±0.04) and CFL (1.68±0.01) groups compared to INC (1.84±0.02) and Control (1.86±0.006) groups. The mortality and leg weakness was also not influenced by light sources.