The reasons standing behind altering feed intake in treated chicks were found to be similar to the reasons mentioned by other studies [24]. They pointed out that increased feed intake in LED group may be due to increased activity and movement of chicks during the photoperiod [9]. On the contrary, the result for feeding intake was not consistent with the findings of Baxter and Bédécarrats [31], they showed that birds under ICD light had significantly higher feed intake than under red LED light.