The current study was conducted in private farm, Ashmon, Menoufia Governorate. The experiment was extended from January 2019 to Feb. 2019. The object of this study was to determine the effect of some environmental factors (such as temperature levels and deferent light intensity) on some broiler production traits. - The studied traits were as follow: Body weights at different ages, growth rate, feed consumption (FC) (kg per bird/cycle), feed conversion ratio FCR, carcass traits and blood characteristics and carcass traits. In general, and based on the results obtained from light and temperature treatments, it was cleared that light intensity 0.5 Lux with 22.1°C improving body weight and best feed conversion and least mortality ratio incomparison with other treatments.