author(s)
Tasaduk Khaliq, AA Khan, Parwaiz Ahmad Dar, Tahir Nazir, Insha Afzal, Mir Bilal and P Tarique

abstract
The present study was carried out during month of January and February in 2015 to evaluate the effect of different wavelengths of light on the behavioral aspects of broilers in the evening hours. A total of 240- day-old straight run broiler chicks were divided into 4 treatments each comprising of four replicates of 15 birds each. Chicks pertaining to treatment group G1, G2, G3 and G4 were provided blue light, green light, red light and plain incandescent light respectively. All treatments were provided continuous artificial photoperiod of 24 hrs upto the rearing period (6wks). The behavioral expressions of study performed by birds was analyzed, assessed and evaluated during different age groups at 2nd, 3rd and 5th weeks of age revealed that birds reared under blue and green light were more calm and relaxed while as those reared under red or yellow light exhibited aggressiveness.